PACIFIC OCEAN (May 21, 2007) – Austin-class amphibious transport dock USS Juneau (LPD 10) test fires one of her Phalanx Close-In Weapon System (CIWS) mounts. The CIWS is a radar-guided 20mm gatling gun used to defend Juneau against anti-ship missiles. Juneau serves under Task Force 76, the Navy's permanently forward-deployed amphibious force operating from Sasebo, Japan.