On September 11, 2001, as four planes were overtaken by terrorists, Ben Sliney, the FAA’s National Operations Manager on duty, made the unprecedented call to ground every commercial flight in the US. It was his first day on job.
TIL In Jerusalem, there is an ‘immovable ladder’ under the window of the Church of the Holy Sepulchre. There since 1757, it cannot be moved without the agreement of all 6 church clerics. Once a chair was moved 20cm which resulted in a fistfight, so now nobody dares to alter the ladder.