Pentagon officials are considering recent reviews of new blast-proof trucks prepared by troops in Iraq that conclude Mine Resistant Ambush Protected vehicles hamper mobility and speed so severely that units are asking to return to their armored humvees, according to a top Defense Department official. The Pentagon's acting acquisition executive and point man for the MRAP program, John Young, provided new information about a wide range of issues related to the blast-proof truck program at a joint hearing today of...