WASHINGTON — President Barack Obama praised broadcasting icon Walter Cronkite as a newsman who "never let us down." The 92-year-old retired CBS News anchorman died Friday night at his Manhattan home after a long illness. In a statement, Obama described Cronkite as a trusted voice who calmly guided America through wars and riots, marches and milestones. "His rich baritone reached millions of living rooms every night, and in an industry of icons, Walter set the standard by which all others have been judged," Obama said.