A demilitarized zone was to be created, extending from the new demarcation line to 5 kilometres (3.1 mi) beyond the line. The demilitarized zone represented the extent of Romanian territorial requests on Hungary. The retreat of the Hungarian army behind the western border of the demilitarized zone was to begin on 22 March.
On March 22, 1956, he was in a Boeing B-29 Superfortress, which was to air-drop a Douglas D-558-2 Skyrocket. He sat in the right-hand pilot seat while the left-hand seat commander, Stan Butchart, flew the B-29. As they climbed to 30,000 feet (9 km), the number-four engine stopped and the propeller began windmilling (rotating freely) in the airstream. Hitting the switch that would stop the propeller's spinning, Butchart found it slowed but then started spinning again, this time even faster than the others; if it spun too fast, it would break apart. Their aircraft needed to hold an airspeed of 210 mph (338 km/h) to launch its Skyrocket payload, and the B-29 could not land with the Skyrocket attached to its belly. Armstrong and Butchart brought the aircraft into a nose-down attitude to increase speed, then launched the Skyrocket. At the instant of launch, the number-four engine propeller disintegrated. Pieces of it damaged the number-three engine and hit the number-two engine. Butchart and Armstrong were forced to shut down the damaged number-three engine, along with the number-one engine, due to the torque it created. They made a slow, circling descent from 30,000 ft (9 km) using only the number-two engine, and landed safely.
On 22 March 1976, Qaboos bin Said married his first cousin, Kamila née Sayyida Nawwal bint Tariq Al Said (born 1951), daughter of Sayyid Tariq bin Taimur Al Said and his second wife, Sayyida Shawana bint Nasir Al Said. The marriage ended in divorce in 1979. She remarried in 2005. The marriage produced no heirs, and Qaboos bin Said wrote secret documents naming the successor to his realm.
On 22 March 2014, Immobile scored his first Serie A hat-trick, in a 3–1 win against Livorno. Three days later, he scored a spectacular volley with his left foot against Roma, temporarily bringing the Granata level at the Stadio Olimpico. On 6 April, he scored the winning goal against Catania in a 2–1 victory.
On 22 March 2017 an Islamist-related terror attack happened in which a man stabbed a police officer after ploughing into pedestrians on Westminster Bridge. Five people were killed, including the attacker and the police officer.