Last month, the US Transportation Security Administration announced that it was going to allow travellers to carry knives on planes once more, and the new rule was supposed to come into action on April 25. However, the TSA has delayed the introduction of the policy — and it's not clear now when the new rule will actually take effect.
Associated Press reports the TSA has delayed the change in policy to assess feedback from the Aviation Security Advisory Committee. It also appears to have been a very sudden change of heart: last week, a TSA spokesperson insisted that the Boston bombing wouldn't affect the new rules, as The Verge points out.
The policy certainly drew its fair share of criticism when it was announced last month, with tthe he Flight Attendants Union Coalition going as far as saying the rules are "poor and shortsighted". And regardless of where you stand on the idea of knives aboard planes, it does seem faintly ridiculous that water should remain banned.