At least 100 Afghans and 13 US troops were killed and hundreds were injured as two suicide bombers and gunmen attacked crowds of Afghans flocking to the Kabul airport in the waning days of airlift for those fleeing the Taliban takeover. The White House said on Friday that the US flag will be flown at half-mast until the evening of August 30 to honour the victims killed in the terrorist attacks in Afghanistan's Kabul.