Bellringer 3/11

I don't think that it's fair that you can take a knife on an airplane, but you can't take toothpaste or shampoo or anything like that. I don't think that shampoo can stab anyone, kill anyone, or put them in any harm... unless they have a huge allergic reaction or something. Like that ever happens. I can't believe that they let this pass. Why would someone need a knife on an airplane?