The Captain may have been informed by Delta that OTHER planes might be subject to hijacking, with the hijackers not acting yet. The BEST POSSIBLE way of dealing with that is a) get the plane on the ground, and b) suggest to the potential hijackers that there was a mechanical problem with the plane, so it might not be usable to destroy a target.
Under these precise circumstances, it was the duty of the pilot to lie to the passengers in exactly this way. Maybe the poster who was on a flight to Houston whose pilot "told the truth" was on a different airline which had not given the pilot a warning about additional possible hijackings.
The pair of "Middle-Eastern" men who got off a grounded plane in St. Louis and then took a train to San Antonio, where they were arrested with substantial money in cash and box cutters, suggests that more than four planes may have been targeted.
Think it thought before you post.
Congressman Billybob
Eff off, Fud. The captain made a perfectly sensible decision.
America's Fifth Column ... watch PBS documentary JIHAD! In America -- here