A year on, questions haunt Iran’s downing of Ukrainian plane

A year after Iran’s military mistakenly downed Ukraine International Airlines Flight PS752 with two surface-to-air missiles, the answers that have emerged from the disaster only seem to lead to more questions. Officials in Canada, which was home to many of the passengers on board, and other affected countries have raised concerns about the lack of transparency and accountability in Iran’s investigation of its own military, while grieving families allege harassment by Iranian authorities.