So to recapitulate Hagen's trip to LA:

-We have established that the plane shown is a Lockheed Constellation.

-The Lockheed Constellation was the only aircraft in service at that time, that was able to make the trip in least amount of time, and able to go non stop.

-In order for Tom to be able to be on Lockheed Constellation at that time, either the Don had to reach in his pocket and contact one of his friends in the military who had access to that type of aircraft, or more likely FFC took "editorial" license to get Tom to LA in the shortest period of time.

-Whoever actually performed the dastardly act on Khartorum has never been established.

-Kudos to dontomasso for being astute in his observation of the inaccuracy in the time line of Tom's trip to LA, and causing the subsequent discussion about aviation at the time.