Trump appears unchanged on Syria policy after ISIS attack that kills U.S. troops President Trump appears to be standing firm on his plan to withdraw U.S. troops from Syria after a deadly attack targeting Americans there. ISIS says it carried out the suicide bombing that killed four Americans and at least 12 others Wednesday. The attack shows how the terror group still has clout, in spite of Mr. Trump's claims the U.S. has "defeated" ISIS. David Martin reports.