TOPSHOTS People visit a makeshift memorial near the headquarters of the French satirical weekly Charlie Hebdo on January 12, 2015 in Paris in tribute to the 17 victims of a three-day killing spree by homegrown Islamists. France announced an unprecedented deployment of thousands of troops and police to bolster security at "sensitive" sites including Jewish schools today, the day after marches that drew nearly four million people across the country. AFP PHOTO/ BERTRAND GUAY