President Donald Trump secretly flew out of last month’s NATO summit in Ankara, Turkiye, on an alternate military aircraft while the White House made it appear that the Republican president was flying on Air Force One, according to a report published by The Washington Post.

The Post said the operation was prompted by an Iranian assassination threat against Trump. The ruse was carried out as journalists and some White House staff members were led to believe they were on the same plane as the president as he began his journey back to Washington.