Updated 19 October 2004, 17.02
A special BBC programme on TV on Sunday highlighted the problem of knife crime among teenagers.
It found that some children as young as 12 were carrying them.
We want to know if you are worried about knives where you live, or at your school.
Does it make you afraid to go out?
Or do you think it's only a small problem and there isn't really anything to get worked up about?
Maybe you know someone who carries a knife?
Whatever your views, e-mail and let us know.
Unfortunately this topic is now closed but there are Comments pages on other subjects on the main Chat index.
I make sure I am with a big group at night. I think that knives are mainly carried by boys to make them look hard but girls do carry them too.
Danielle, 13, South Wales
I've seen loads of kids with knives, both in school and out. It does make me a bit nervous about going for little walks around the fields by my house, but I don't let it rule me. There's a chance of lots of things happening, I could trip and crack my head open, but that doesn't stop we walking down the pavement.
Juliette, 13, Cardiff
Knives are scary and dangerous. I think checks should be carried out at school and leaflets and professional talkers should come into school and give everyone more information so they realise how dangerous knifes really are
Claire, 11, Ireland
Stabbing isn't really a problem where I live, although reports about stabbings anywhere in the country unnerve you slightly. But it's not one of those things where I lie in bed worrying about it, but the thought of being stabbed is quite creepy...
Kate, 14, Aylesbury
It is quite worrying to know that children as young as me are carrying dangerous weapons that can really harm somebody.
Lou, 11, Milton Keynes
I am worried, because those small metal things that can be used in such harmless things, like cutting bread, could take away lives of innocent people. Children who are looking for trouble might carry them round, but I think most of the time its only for showing off, not actually using them.
Hannan, 13, Newcastle
I'm not scared of them at my school, but I can't go anywhere alone at night because it's too dangerous!
Laine, 15, New York
Not really, even though somebody was carrying a knife at my school - and he was only a year seven! I just don't think about those kinda things so they don't bother me.
Kate, 12, Sunbury
I do worry about the knife problem but we can't let it effect our lives. I hope some one comes up with the plan to stop it.
Kirsty, 13, Hull
Carrying knives in school is dangerous. The school should do a daily check of your bags and pockets.
William, 10, Henshaw
I would say I am very worried about knife crime. My boyfriend was stabbed in a racist attack and was left with a awful scar on his side. Also a boy who went to my school who lived near my area was stabbed I think more needs to be done about this situation, people don't realise how big a problem it is.
Sasha, 15, Leicester
I do get nervous when I hear that someone has been injured in a knife attack and I think that people who carry knives are really stupid.
Georgie, 10, Bordeaux
It isn't really a problem where I live so I don't have to think about it.
Karen, 13, Sutton
I am not at all worried about young people carrying knives. It doesn't make me not want to go out and it isn't something I am getting worked up about. I know a couple of people who carry a knife and I know for a fact that they would only use it in self defence.
Hannah, 14, London
I am getting worried about knives...my friend was threatened by another boy with one. I really hope someone does something to stop people going around with them.
Rachel, 14, Cardiff
I would never carry a knife to school, although once my mate was threatened by someone after school with a knife. My area is slightly dodgy, so you have to watch your step, but we have a curfew from after 9pm, so that does help.
Naomi, 11, Ewell
This does worry me quite a lot, I know lots of people that carry knives and I'm sure many more do that I'm not aware off. People are attacked for no reason and I'd hate to be next. At school people are always taking the knives that we use in science, I don't even feel safe at school.
Kayte, 15, Witney
Yes I am worried because some one in my school brought a knife and threatened some one with it.
Rachel, 11, Bradford
I do worry about knives but I try not to let it affect my life. All I want to do is to have fun and not to be worrying about people attacking other people with knives. Anyone who does carry a knife thinks they are cool but they're not they're just being stupid.
Louise, 14, Aberdeen
Not really. If that many teenagers carry knives, then I must have been around at least a few armed young people before. If nothing happened to me then, why should anything happen now just because I know about it?
Liz, 14, Swanley
It does make me worried when I hear about teenagers in knife attacks. I try not to go out on my own now after dark to be safe.
Kerry, 13, Leicester