The Army held its annual pageant, known as the Association of the U.S. Army conference, in Washington D.C., last month. For three days, we walked the floor of the cavernous conference hall, checking out the weapons, vehicles and ideas that hundreds of military contractors are developing for the Army — and what futuristic stuff they're trying to pawn off on the nation's ground forces. Whatever these companies come up with, rest assured you're going to be paying for it.