keywords: iraqis kills iraqi bomber baghdad
text: Suicide Bomber Kills 18 Iraqi Troops, 1 Civilian  BAGHDAD, Iraq (Reuters) - A suicide car bomber hit a bus  carrying Iraqi National Guards on Sunday, killing 19 people in  the deadliest attack of its kind in nearly four months on  Iraqis cooperating with U.S. forces to secure a Jan. 30  election.