TOPSHOTS French president Francois Hollande leaves after delivering a speech during a ceremony to pay tribute to the three police officers killed in the attacks on January 13, 2015 at the Paris's prefecture. Police officers Ahmed Merabet, 40, Franck Brinsolaro, 49, were killed during the attacks at Charlie Hebdo, and Clarissa Jean-Philippe killed in Montrouge last week. AFP PHOTO PATRICK KOVARIK