Dead Zero (Abridged)

Who killed Whiskey 2-2?
And why won't it stay dead?

A marine sniper team on a mission in tribal territories on the Afghan-Pakistan border, Whiskey 2-2 is ambushed by professionals using the latest high-tech shooting gear. Badly wounded, the team's sole survivor, Gunnery Sergeant Ray Cruz, aka "the Cruise Missile," is determined to finish his job. He almost succeeds when a mystery blast terminates his enterprise, leaving a thirty-foot crater where a building used to be - and where Serg…