catastrophic threat, and these are the knives that tsa says will now be allowed. they are knives with blades that are no longer than 2.36 inches and they are also knives that do not lock in place. so that's why the change now. who has a problem with it? well, for one, senator chuck schumer of new york. add news conference today urging the tsa to change its mind. he said if it didn't, he might try to make them. >> if the tsa refuses to go along we would consider legislation and my guess is it would be large bipartisan support. i don't know anybody who has defended the tsa on this on the merits because it just doesn't make any sense. >> now, there is more opposition, not just lawmakers. look at this petition on white house.gov. this was put up the day this policy announced. it's being pushed by unions representing flight attendants. it's a petition opposing a new knife policy and so far, as you can see there, it has more than 18,000 signatures. flight attendants, don, are