Americans are speculating what it means to spot the doomsday plane flying over their town but one thing is sure, it's not a good sign as it has been noted as a response to a potential nuclear war.

If you see large military planes flying low over Angeles National Forest and dropping water north of Los Angeles this week, here's why.

Passengers deplaned using a jet bridge. Videos shared by 9NEWS viewers showed a plane flying over the area with what appeared to be flames coming out of one of its engines, around the same time ...