U.S. President Donald Trump secretly switched to a smaller military aircraft while leaving Turkey last month due to a potential Iranian security threat, according to a Washington Post report published Monday. The trip marked the plane’s first international journey in presidential service and came amid heightened tensions involving Iran, which shares a border with Turkey. Questions about Trump’s travel arrangements emerged when he unexpectedly boarded an older Air Force One aircraft before departing Ankara. The smaller military aircraft then carried Trump to Britain, landing at approximately 10:20 p.m. The older Air Force One, which was transporting members of the media, reportedly arrived several minutes later.