Tourists visit the site of Eiffel Tower which remained closed on the first of three days of national mourning in Paris, Sunday, Nov. 15, 2015. Thousands of French troops deployed around Paris on Sunday and tourist sites stood shuttered in one of the most visited cities on Earth while investigators questioned the relatives of a suspected suicide bomber involved in the country's deadliest violence since World War II. (AP Photo/Daniel Ochoa de Olza)

Photos: Paris terror attacks

Photos from the shootings and bombings in Paris on Nov. 13, 2015. All photos courtesy Associated Press

A man holds his head in his hands as he lays flowers in front of the Carillon cafe, in Paris, Saturday, Nov.14, 2015. French President Francois Hollande vowed to attack Islamic State without mercy as the jihadist group admitted responsibility Saturday for orchestrating the deadliest attacks inflicted on France since World War II. (AP Photo/Thibault Camus)

France vows ‘merciless’ war on IS for Paris attacks that kill 127

French President Francois Hollande called the carnage “an act of war that was prepared, organized, planned from abroad with internal help.”