Childs of Revolutionary Armed Forces of Colombia (FARC), in Los Pozos, in the rebel controlled zone in southern Colombia where peace talks are being held with the government, on Thursday, Jan. 27, 2000. A study called "Like Lambs Among Wolves" was authored by Natalia Springer, the dean of the law school at Universidad Jorge Tadeo Lozano in Bogota, Colombia. Springer, who's also a political analyst and a human rights activist, has found that in the last four years, 18,000 children have been forced to join guerrilla groups and paramilitaries in Colombia.

(Photo/ William Fernando Martinez)

Under heavy rain some of 242 police and soldiers captured in battle by rebels walk in front

of guerrillas of the Revolutionary Armed Forces of Colombia, FARC, who released them at a makeshift camp in La Macarena, a rebel controlled area in southern Colombia, Thursday, June 28, 2001. The servicemen, who languished for more than three years in jungle pens surrounded by barbed and rings of rebel security, were released by the rebels to Red Cross and government officials.

(Photo/William Fernando Martinez)

Some of the 242 police and soldiers captured in battle by rebels speak with Revolutionary Armed Forces of Colombia, or FARC, commander Pedro Antonio Marin, Manuel "Sureshot" Marulanda., in La Macarena, in the rebel controlled area located in southern Colombia, as they are escorted by rebel of the Revolutionary Armed Forces of Colombia (FARC), Thursday, June 28, 2001. Colombia's most powerful guerrilla army freed the war prisoners Thursday, calling the mass release of government soldiers and police a gesture of peace. (Photo/ William Fernando Martinez)

Paramilitary head commander, Salvatore Mancuso, offers his hand to a paramilitary soldier
of the Banana Bloc who has just turned in his gun, during a ceremony near Turbo, Colombia,

Thursday, Nov. 25, 2004. 452 paramilitaries of the United Self-Defense Forces of Colombia,
or AUC, turned in their arms today as part of an on-going peace process.

(Photo/ William Fernando Martinez)

Nasa Indians drag a soldier during an attack on half a dozen soldiers guarding a communications tower on the outskirts of Toribio, southern Colombia. Six soldiers were attacked and dragged along the ground by dozens of indigenous people demanding the departure of security forces and guerrillas fighters because of their constant fighting. The soldiers dropped their guns, never firing. No injuries were reported. (AP Photo/William Fernando Martinez)

Diana Marcela Sierra carries the hat of her brother, Colombian National Police Lieutenant Anibal Sierra, during his funeral in Bogota, Thursday, Dec. 29. Sierra was killed by leftist rebels in Puerto Rico, some 120 miles south of Bogota, earlier this week. In a different attack rebels of the Revolutionary Armed Forces of Colombia, FARC, killed 29 soldiers who were protecting government workers during a coca eradication effort Tuesday. (AP Photo/William Fernando Martinez)

Colombian narcotic police officers stand guard in an opium poppy field in Tuquerres,

330 miles from Pasto, southwest of Bogota, Colombia, Sunday, Nov. 19, 2006.

(AP Photo/ William Fernando Martinez)

Panamanian Police Lt. Jorge Cera stands in a formation during a training in Espinal, Colombia, Wednesday, March 7, 2007. Troops from different countries, including for the first time four members

of the Afghan National Interdiction Unit, are taking part in a 18-week Commando International Course with the Colombian National Police's elite "Jungla" CN assaultforces in narcotic interdiction.

(AP Photo/William Fernando Martinez)

Yanibe Micolta, 7, stands inside a makeshift shelter in El Charco village in southwestern Colombia, Saturday, April 21, 2007. At least 2000 people have arrived to El Charco fleeing fighting in the area between rebels of the Revolutionary Armed Forces of Colombia, FARC, and government troops, authorities said. (AP Photo/William Fernando Martinez)

A Colombian soldier stands guard inside a trench, in Barrancominas, Guania , Colombia, Monday, May 5, 2001. (Photo/ William Fernando Martinez)

Nevardo Sanchez, 25, who was blinded after a land mine explosion, is touched by his wife
Marleni Ospina in a home run by the church in Bogota, Colombia, Monday, April 3, 2006.

Tomorrow Colombians will observe the International Day for Mine Awareness and Assistance

in Mine Action, celebrated each year on April 4. (AP Photo/William Fernando Martinez)

A police officer  juggles his rifle during a pólice ceremony at Police School in Yuto, Choco, Colombia Thursday, June,12, 2008. (Photo/William Fernando Martinez)

A Colombian boy collects resin from poppies in an heroin poppy field in Almaguer, Cauca, Colombia, June 20, 2000. (Photo/William Fernando Martinez)

Paramilitary members of the Banana Bloc who has just turned in his gun, during a ceremony near Turbo, Colombia, Thursday, Nov. 25, 2004. 452 paramilitaries of the United Self-Defense Forces of Colombia, or AUC, turned in their arms today as part of an on-going peace process

(Photo/ William Fernando Martinez)

A homemade prosthetic leg is observed at rehabilitation center in Bogota,

Colombia, July 5, 2000. (Photo/ William Fernando Martinez)

A boy looks on as he flees his hometown aboard a truck  after gunmen killed 60 men and burned down dozens of homes in the small village El Salado, Bolivar, 470 miles north of Bogota, Colombia, Wednesday, Feb. 21, 2000. Witnesses told police that the attackers were members of right-wing paramilitary groups who accused the victims of working with leftist guerrilla groups. After the assault, many villagers fled for neighboring hamlets. (Photo/ William Fernando Martinez)

Police Officers rappel during a practice in Mariquita, Tolima, Colombia Wednesday, May,7, 2008.

(Photo/ William Fernando Martinez)

Police officer Jhon Pinchao Blanco cries during a news conference at the Presidential Palace in Bogota, Wednesday, May 16, 2007. Blanco escaped from Colombian rebels after more than eight years of captivity and was found deep inside the Amazon jungle. The officer was among about

60 politicians, soldiers and police including three American defense contractors held by the Revolutionary Armed Forces of Colombia, or FARC. (AP Photo/Willian Fernando Martinez)

Former hostage Ingrid Betancourt, right, embraces her mother Yolanda Pulecio upon arrival
to a military base in Bogota after being rescued from six years of captivity, Wednesday, July 2, 2008. Betancourt is one of 15 hostages rescued by Colombia's military from the Revolutionary Armed Forces of Colombia, or FARC. Betancourt was abducted by the FARC when running for president in Feb. 2002. (AP Photo/William Fernando Martinez)

A forensic investigator checks the skull of one of the 57 human remains that were found

in a mass graves in the town of La Cooperativa, near San Jose del Guaviare, in southeastern

Colombia, Thursday, April 26, 2007, allegedly killed by paramilitaries.

(AP Photo/ William Fernando Martinez)

A woman  covers with a umbrella to a man buried up to his neck as part of a protest in a plaza in Bosa, south of Bogota, Colombia, Friday, July 21, 2006. They are part of a group of Colombia who say they have fled to the country's capital, running from the violence that rages through much of the countryside. The group of about 600 people have been camped out in the plaza for 11 days demanding government aid. (AP Photo/William Fernando Martinez)

Students fire a home made weapon inside the National University toward riot police as

they protest Colombia's fee trade agreement with the U.S. in Bogota, Colombia, Tuesday,

May 15, 2012. The U.S.-Colombia free trade agreement went into effect at midnight.

(AP Photo/William Fernando Martinez)

A demonstrator embraces a riot police officer during a student protest against government plans to reform higher education in Bogota, Colombia, Thursday, Nov. 10, 2011. Thousands of students march in the country's main cities despite a government proposal to withdraw a reform bill on higher education. (AP Photo/William Fernando Martinez)

Protesters broke glasses of a bank during a May Day march in Bogota, Thursday, May 1,

2008. In the background, a banner with an image of Argentine-born Cuban revolutionary

leader Ernesto "Che" Guevara. (AP Photo/William Fernando Martinez)

A woman prepares to inject the lifeless body of a young man killed during traditional festivals "Balls of Fire" in Carmen  de Bolivar, Colombia, Thursday, July 16,2009.

(Photo/William Fernando Martinez)

A peasant boy rests next to the small fossils he has collected for sale in rural area of Villa de Leyva, Colombia, June 3, 2000. (Photo/William Fernando Martinez)

A veteran dancer  called "El Cicodelico" dance during  his presentation at Colombia Salsa Fair Dancers  in Cali, Colombia,  Friday, Dec.29. 2011. Cali, Colombia is known by most of the Latin America as the world's "Capital of Salsa". The "Feria de Cali" is the largest Salsa festival in the world and is held every December, with the world's top dancers and salsa groups performing. Cali, is also home of some of the largest collections of Salsa Music in the world, including associated rhythms such as Son, Mambo, Bolero, Guaracha, Vallenato, Fox, Tango, Cumbia, Pachanga and Boogaloo.

(Photo/William Fernando Martinez)

A dancer jumps while she dances in the s streets of Cali, Colombia, Tuesday, Dec. 25, 2012. Groups of salsa schools perform in different neighborhoods during the Cali Fair, one of the most important city's cultural event, famous for the salsa marathon, horse riding parades and dance parties.

(Photo/William Fernando Martinez)

Young musicians wait to parade during a military ceremony to celebrate 200 years of independence from Spain in Quibdo, northeastern Colombia, Tuesday , July 20, 2010.

(AP Photo/William Fernando Martinez)

A group of bands of musicians make their way during the traditional Porro Festivalin San Pelayo, Saturday, June 27,2009. (Photo/William Fernando Martinez)

Carlos Enrique Vides, right, is gored by a bull during the Corralejas Bull Festival in Sincelejo, Colombia, Sunday, Jan. 20, 2008. Hundreds of people risk their lives jumping into the ring with 1000-pound bulls for fun in an age-old tradition that is popular in towns across Colombia's northern plains.

(AP Photo/ William Fernando Martinez)

Colombian writer Gabriel Garcia Marquez, center with a white shirt, waves to fans as he rides

in a horse drawn carriage in Aracataca, Colombia, Wednesday, May 30, 2007, on his first

visit to his hometown since he won the Literature Nobel Prize in 1983.

(AP Photo/William Fernando Martinez)

A horseman falls from a horse, after being gored by a bull during the Corralejas Bull Festival in Sincelejo, Colombia, Tuesday, Jan. 23, 2007. (AP Photo/ William Fernando Martinez)

A man in a wheelchair is carried during the 25th Colombia Rock Festival in Bogota, Monday, June 29, 2009. (AP Photo/William Fernando Martinez)

Dancers take a rest after the popular parade Guacherna in Barranquilla , Saturday, Feb. 14,2009. (Photo/William Fernando Martinez)

Monserrate church is covered with lights for the Christmas season overlooking Bogota, Colombia, Thursday Dec. 16, 2010. (AP Photo/William Fernando Martinez)

Fireworks crack over the people during the National Band Festival in Paipa, Colombia, Saturday, Oct. 6, 2012. Every year, Paipa hosts the nationwide competition for professional brass bands.

(AP Photo/William Fernando Martinez)

A veterinarian holds a baby Brotogeris Jugularis, a parrot known as "bronceado", at a temporary shelter in Bogota, Friday, Feb. 29, 2008. According to the police, an average of 50 animals are seized from illegal traders daily in Bogota, many of them individuals of endangered species that will be sold as pets. (AP Photo/William Fernando Martinez)

A close up of the eye of a Phyllomedusa Venusta frog that is kept inside a glass box at a laboratory of Los Andes University in Bogota, Colombia, Friday, Feb. 4, 2011. The university's Biology Department investigates on tropical amphibians of which Colombia boasts a great variety.

(AP Photo/William Fernando Martinez)

In this photo taken Dec. 28, 2010, an insect is devoured by a Dionaea Muscipula during

a carnivorous plants exhibition at the Botanic Garden in Bogota, Colombia.

(AP Photo/William Fernando Martinez)

A man who identifies himself as Caim gestures at the IV International Tattoo Artist Convention in Bogota, Sunday, June 6, 2010. (AP Photo/William Fernando Martinez)

Alternative Democratic Pole party's presidential candidate, Gustavo Petro, center, has his hair brushed before a televised presidential debate in Bogota, Friday, May 28, 2010. Colombia will hold presidential elections on May 30. (AP Photo/William Fernando Martinez)

Antanas Mockus, presidential candidate for the Green Party, gestures during his concession speech after loosing the presidential election runoff to Juan Manuel Santos in Bogota, Sunday, June 20, 2010.

(AP Photo/William Fernando Martinez)

Colombia's Literature Nobel Prize winner Gabriel Garcia Marquez and his wife, Mercedes Barcha, wave upon their arrival on a train to Aracataca, Wednesday, May 30, 2007, on his first visit in 25 years to his hometown in northeastern Colombia. (AP Photo/William Fernando Martinez)

Venezuela's President Hugo Chavez, left, talks to Colombia's President Alvaro Uribe during the inauguration ceremony of a natural gas pipeline which connect Colombia and Venezuela, in Ballenas, Colombia, Friday, Oct. 12, 2007. (AP Photo/William Fernando Martinez)

Colombian President Alvaro Uribe is seen with an ash cross on his forehead on Ash Wednesday, as he registers his name for the presidential elections in Bogota, Colombia, Wednesday, March, 1, 2006. The elections are set to take place in May. (AP Photo/William Fernando Martinez)

Police Officers rappel during a practice in Mariquita, Tolima, Colombia Wednesday, May,7, 2008. (Photo/ William Fernando Martinez)

A truck is pulled for farmers to avoid rush into an abyss  in Inza, Cauca, Sept. 22, 2007.

(William Fernando martinez)

A soldier stands guard in a makeshift drug lab in the village of Cumaribo near The Tuparro National Park, some 325 kilometers (202 miles) southeast of Bogota, Colombia, Thursday, Nov. 30, 2006. Intruders have built makeshift drug labs in the park bringing in tons of gasoline, cement, hydrochloric acid and other toxic chemicals to process coca leaves into cocaine. All of it pollutes the rivers and soil. (AP Photo/ William Fernando Martinez)