Paris attacks: ISIS claims responsibility
Authorities in France and Belgium took people into custody Saturday in the aftermath of the worst violence in France since World Word II, a series of terror attacks that killed more than 120 people. ISIS claimed responsibility for the horrific Paris attacks, for which France vowed revenge. President Francois Hollande deemed the shootings and bombings "an act of war." He said early Saturday, "We will lead the fight, and we will be ruthless."