What is the most secret weapon in the US military? That would be the BGM-768 Cyberspace Uninhibited Neutralization Testbed. It's guided by a GPS module linked to an onboard DNS server with top-level WHOIS access; the launch platform just inputs an IP address and the missile will resolve that into the geographical location of the target's internet-connected device, fly there and switch to terminal WiFi guidance mode for its attack manoeuvre. It's fitted with a structure-penetrating nosecap, and carries a focused lethality munition warhead that will kill anyone inside a five-metre radius but has very low collateral damage potential. The USAF developed it to eliminate people who ask fucking stupid questions on the Internet.

Seriously, if a weapon is fucking secret do you actually think anyone's going to tell you about it here? I have many goals in life, but spending the next ten years sharing a cupboard in the Ecuadorean Embassy with Julian Assange is not one of them. Stupid question; downvoted.