Army weapons testers in the Maryland woods today are kicking off a six-week evaluation of prototype armored vehicles -- including punishing rounds of blast and ballistics tests -- that are expected to influence major contract awards this summer for the manufacture of a new Mine Resistant Ambush Protected (MRAP) fleet. Nine contractors, each jockeying for a piece of the MRAP program that could be worth more than $8 billion, were each due to deliver by today four candidate vehicles to...