* Headlines for Thursday, March 7th, 2002 * Stopping the War On the Poor: After Hundreds Storm the Conservative Heritage Foundation, Oneof the Country's Leading Conservatives Agrees to Walk in Poverty's Shoes * Entertainment Takes Over the Network News: Disney's Stocks Rise As Ted Koppel Fights for"Nightline's" Survival On Disney's Abc, Threatened By a Possible Letterman Takeover