The incident happened when the American President approached the helicopter of the marine Corps of the United States. As seen on the record, one of the soldiers a strong wind from the head blew off the cap. This soldier is under the rules remained motionless, keeping his hands at his sides.
Tramp, noticing this, lifted his cap and tried to put it on the head of the soldier, but the wind blew it again. Then the President has given up and patted the soldier on the shoulder, then climbed aboard the helicopter.