Tough Enough

S5 E1: In this episode, Jay Leno explores some of the world's toughest vehicles. First, he takes comedian Kevin Hart on a near-deadly ride in one of the most outrageous off-road vehicles in the world. Then, he puts Storm-chaser Reed Timmer's "Dominator" stormproof vehicle to the test against a jet airplane. Later, he meets some of the toughest drivers in the world- injured veterans who use high-speed racing as rehabilitation. And finally, Jay pushes the world's fastest armored car -- and himself -- to the limit, in a wild chase where the bad guys use real bullets!