God Bless Our Troops!!!
I aways carry a knife. This is the best backup you can have. You will use a good knife every day you carry it. Mine is a Blackie Collins Mjerico folding Tanto. Great blade, easy to sharpen and quick to deploy. One suggestion use a lanyard to tie your knife to your belt. It should be at least arms length but not allow your blade to hit the ground. (lesson learned while stationed in AK). You can't easily loose what is tied to you with 550 (para) cord.