Engine Trouble (2002)

Engine Trouble is a 2002 17-minute long fantasy short film about a 7 year old girl who is convinced by her tough-talking toy fire engine, Rusty, that he is needed as a reinforcement for the FDNY on September 11. It directed by Brad Barnes, written by Brad and Todd Barnes, produced by Todd Barnes and starred by Celine du Tertre and voice of Academy Award-winner actor Christopher Walken.

More at Wikipedia.