Flight numbers are often taken out of use after a crash or a serious incident. For example, following the crash of Malaysia Airlines Flight 370, the airline changed the flight number for subsequent flights following the same route to MAH 318. Also, American Airlines Flight 77, which regularly flew from Dulles International Airport in Washington, DC, to Los Angeles International Airport, was changed to Flight 149 after it crashed into the Pentagon during the September 11 attacks. After the crash of Air France Flight 447, a regular scheduled flight from Rio de Janeiro to Paris, was changed to Air France Flight 443. On the other hand, other considerations may lead an airline not to change a flight number; for instance, the aforementioned "flagship" American Airlines Flight 1 retains its designation despite a major accident in 1962 and two other accidents in 1941 and 1936. There are at least five instances of flight numbers that have suffered two serious accidents: Flight 253 of Linea Aeropostal Venezolana (both in 1956, the first in June, and the second in November), Flight 869 of United Arab Airlines (the first in 1962 and the second in 1963), Flight 800 of TWA (the first in 1964 and the second in 1996), Flight 383 of American Airlines (the first in 1965 and the second in 2016), and Flight 9268 of the Russian Federation (the first in 2012, and the second in 2015). As of October 2019 the most recent flight number change due to an accident was from Aeroflot Flight 1492 to Aeroflot Flight 1316.