Listen to a recording of the original performance of this quote:
Houston, we have a problem.
Note: ranked #50 in the American Film Institute's list of the top 100 movie quotations in American cinema. In real life, the quote was "Houston, we've had a problem." Apollo Expeditions to the Moon, ch. 13.1, by James A. Lovell. The original phrase pronounced by Jack Swigert, "Houston, we've had a problem here" and then repeated by Lovell, "Houston, we've had a problem", was altered to a present-tense in the film script.