A Ukrainian airliner crashed shortly after take-off from Tehran on Wednesday killing all 176 on board, mainly Iranians and Canadians. Search and rescue teams were combing through the smoking wreckage of the Boeing 737 flight from Tehran to Kiev but officials said there was no hope of finding anyone alive. The vast majority of the passengers on the Ukraine International Airlines (UIA) flight were non-Ukrainians, including 82 Iranians and 63 Canadians.