The Post said the operation was prompted by an Iranian assassination threat against Mr Trump. Mr Trump had flown to the summit in a new Qatari-gifted and retrofitted red, white and navy blue jet. But ahead of departing from Turkey, he said he would fly partway home on an older-model baby blue Air Force One plane instead. While Mr Trump was in Turkey, the US military conducted a series of large strikes in Iran in retaliation for its attacks on merchant shipping in the region. The small group of reporters who thought they were travelling with Mr Trump were advised to lower their window shades ahead of take-off.