Colombia's President Ivan Duque walks next to Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, as they take part in a ceremony in honour to the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque, Vice President Marta Lucia Ramirez, Foreign Minister Claudia Blum, Defense Minister Carlos Holmes Trujillo, U.S. Secretary of State Mike Pompeo and Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, take part in a ceremony in honour to the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque, Vice President Marta Lucia Ramirez, Foreign Minister Claudia Blum, Defense Minister Carlos Holmes Trujillo, U.S. Secretary of State Mike Pompeo and Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, take part in a ceremony in honour to the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque, U.S. Secretary of State Mike Pompeo, Venezuelan opposition leader Juan Guaido, Colombia's Vice President Marta Lucia Ramirez and Colombia's Foreign Minister Claudia Blum lay a wreath in honour of the cadets killed in the 2019 car bomb attack at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque, Vice President Marta Lucia Ramirez, Foreign Minister Claudia Blum and Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, take part in a ceremony in honour to the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque kneels next to U.S. Secretary of State Mike Pompeo, Venezuelan opposition leader Juan Guaido, Colombia's Vice President Marta Lucia Ramirez and Colombia's Foreign Minister Claudia Blum as they lay a wreath in honour of the cadets killed in the 2019 car bomb attack at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Relatives of the cadets killed in the 2019 car bomb attack, attend a ceremony at the Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Relatives of the cadets killed in the 2019 car bomb attack, attend a ceremony at the Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque and Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, greet families of the cadets killed in the 2019 car bomb attack, at Santander General School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

U.S. Secretary of State Mike Pompeo greets families of the cadets killed in the 2019 car bomb attack, at the Francisco de Paula Santander General Police Cadet School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

U.S. Secretary of State Mike Pompeo greets families of the cadets killed in the 2019 car bomb attack, at the Francisco de Paula Santander General Police Cadet School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

Venezuelan opposition leader Juan Guaido, who many nations have recognised as the country's rightful interim ruler, greets families of the cadets killed in the 2019 car bomb attack, at the Francisco de Paula Santander General Police Cadet School, in Bogota, Colombia January 20, 2020. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. The placard reads, "Life is sacred". REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. The placard reads, "Life is sacred". REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. The placard reads, "Bogota gets together against terrorism". REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

A member of the police places her hand over her chest while singing the national anthem during a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

A member of the police places her hand over her chest while singing the national anthem during a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. The placard reads, "Peace". REUTERS/Luisa Gonzalez 

A woman applauds police officers during a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

A woman embraces a police officer during a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

A man holding a placard that reads, "To the terrorism, we say no", as he takes part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque takes part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque walks next to with his wife, Maria Juliana Ruiz and the Colombian Vice President, Marta Lucia Ramirez during a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque walks next to with his wife, Maria Juliana Ruiz during a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque takes part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

Colombia's President Ivan Duque walks next to with his wife, Maria Juliana Ruiz and the Colombian Vice President, Marta Lucia Ramirez during a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a rally against violence, following a car bomb explosion, in Bogota, Colombia January 20, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez TPX IMAGES OF THE DAY 

A sign that reads "United against terrorism" is seen in front of the scene where a car bomb exploded, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

A woman holds a sign that reads "We demand justice, respect for our Army and Police institutions" in front of the scene where a car bomb exploded, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

A sign that reads "No to terrorism, Colombia is in mourning" is seen in front of the scene where a car bomb exploded, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

A child dressed as a police officer reacts during a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

Police officers stand guard outside the scene where a car bomb exploded, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

A man places flowers in front of the scene where a car bomb exploded, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil to honor victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil to honor victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

A woman puts flowers in front of the scene where a car bomb exploded, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

People take part in a candlelight vigil for victims, near the scene of a car bomb explosion, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

A fire truck moves in front of the scene where a car bomb exploded, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

A police officer stands guard outside the scene where a car bomb exploded, in Bogota, Colombia January 18, 2019. REUTERS/Luisa Gonzalez 

Police and security personnel work at the scene where a car bomb exploded, according to authorities, in Bogota, Colombia January 17, 2019. REUTERS/Luisa Gonzalez TPX IMAGES OF THE DAY 

A police officer and two women wipe their tears close to the scene where a car bomb exploded, according to authorities, in Bogota, Colombia January 17, 2019. REUTERS/Luisa Gonzalez TPX IMAGES OF THE DAY 

People take part in a candlelight vigil to honor victims, close to the scene of a car bomb explosion, in Bogota, Colombia January 17, 2019. REUTERS/Luisa Gonzalez