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This was found on call of duty: MW so I'm thinking it should work on WAW.
DOESN'T ALWAYS WORK!
Firstly, you need to have 2 claymores and an airstrike. Put down one claymore and then as soon as you plant the second one, hold down the right arrow on the D-PAD. You should be on the airstrike menu and you'll have a detonator, now hit O (PS3) or X (XBOX) and you should have the detonator. Hit LB and you should have C4 that can't explode, now kill yourself and wala!
I DIDN'T FIND THIS.
If you don't get it PM: Dingus24
Feel free to +rep.