Oh,sh*t that's not good at all!
I've already passed the K.F that you have to kill 20 cops in 60 seconds with uzi (wihout accept Tanks giving mission),and I died right after I passed it but,I saved anyway, and got a lot of weapons again
(I finally passed no way I won't save,even if lost all my weapons). now I'll have to collect weapons again
and I already took #19 without die,I edited my post above.
sorry if my english,isn't so good.