On Jan. 7, 2015, two brothers belonging to Al-Qaeda in Yemen stormed the Paris offices of the satiric weekly Charlie Hebdo, killing 11 people and injuring 11 others before killing a French police officer. Amidst a massive manhunt for the killers, an additional five people were murdered and 11 wounded in related attacks over the next two days, including a harrowing standoff between police and a third gunman, claiming allegiance to ISIS, at a kosher supermarket near the Porte de Vincennes in Paris. THREE DAYS OF TERROR: THE CHARLIE HEBDO ATTACKS Debuts MONDAY, SEPT. 19 (8:00-9:00 p.m. ET/PT), on HBO.