WASHINGTON - The subject was whether to modify helmets for soldiers in Iraq, but all eyes were on Cher. As photographers clicked away, the singer and actress entered a Capitol Hill hearing room through a back door 20 minutes after the session was scheduled to start. The hearing soon got under way. Cher has donated more than $130,000 to the group Operation Helmet, which pays about $100 to modify the inside of soldiers' helmets to make them better able to absorb shock from a bomb blast. Cher, wearing a white lace top under a black pant suit, looked solemn as...