sentences:  2008 IAAF World Half Marathon Championships
  
  The 2008 IAAF World Half Marathon Championships were held in Rio de Janeiro, Brazil on 12 October 2008.This event was first announced as the 2008 IAAF World Road Running Championships, but in November 2007, the IAAF announced that the name of the IAAF World Road Running Championships would revert to its original title of the IAAF World Half Marathon Championships.