Argentine cartoonists (from R) Hermenegildo Sabat, Joaquin Salvador Lavado, also known as Quino, Fernando Sendra and Carlos Garaycochea pose for a photo next to a large screen that reads "I am Charlie" during a tribute to the victims of the Charlie Hebdo shooting, at the Humor Museum in Buenos Aires January 12, 2015. Seventeen people, including journalists and police, were killed in three days of violence that began on Jan. 7 when militants burst into Charlie Hebdo's Paris office during a regular editorial meeting and shot dead five of its leading cartoonists. REUTERS/Marcos Brindicci (ARGENTINA)