of an act president obama signed in march which provides employers with a refund on payroll taxes. as the cement hardens in the crippled oil well in the gulf of mexico, there is a change in bp's gulf coast efforts. noinl police say the bodies of four people have been found in a house in riverdale, maryland outside washington, d.c. there is no word yet on the circumstances of the deaths. more top stories in 20 minutes. the final leg of the journey home. cnn's barbara starr, pentagon correspondent, takes us aboard an airborne hospital with critically wounded troops. her exclusive report following wounded heroes from the war front to the home front. >> this is what it's really all about in the world of the air medical evacuation community. you can see, the plane now is full of the combat wounded from