WASHINGTON - Sen. Barack Obama (news, bio, voting record) fought back Wednesday against an allegation that he was educated at a radical Islamic school as a child in Indonesia, determined to avoid being tripped up by unsubstantiated charges like those that undermined John Kerry in 2004. Interviews by The Associated Press at the elementary school in Jakarta found that it's a public and secular institution that has been open to students of all faiths since before the White House hopeful attended in the late 1960s. Obama, who was born in Hawaii, moved to Indonesia at age 6 to live with...