WASHINGTON: Taliban assassinations of Afghan pilots detailed by Reuters this month mark another "worrisome development" for the Afghan Air Force as it reels from a surge in fighting, a US government watchdog said in a report released on Thursday. At least seven Afghan pilots have been assassinated off base in recent months, two senior Afghan government officials told Reuters , part of what the Taliban says is a campaign to see US-trained Afghan pilots "targeted and eliminated." As the United States prepares to formally end its 20-year military mission in Afghanistan on Aug. 31, Taliban insurgents are quickly seizing territory once controlled by the US-backed government of President Ashraf Ghani, raising fears they could eventually try to take the capital Kabul. Read: US 'deeply troubled' by attacks on civilians as Taliban sweep across Afghanistan The Special Inspector General for Afghan Reconstruction (SIGAR), in its quarterly report ...