Over the last three weeks, millions of French citizens have taken to the streets to protest President Nicolas Sarkozy's pension reform plan. The reform plan, which includes raising the minimum retirement age from 60 to 62, and the full retirement age from 65 to 67, is currently before the Senate and expected to pass later this week. Despite rising tensions, Sarkozy has refused to back down, vowing to crack down on the "troublemakers." But with gas stations running dry and trash piling up -- and the rioters becoming increasingly violent -- the French president faces his toughest week in office. Here, young men throw stones at anti-riot police forces on Oct. 19 in Lyon.