They need fresh meat to serve as bullet stoppers.

http://fromthetrenchesworldreport.com/war-in-august-us-sends-fourth-aircraft-carrier-and-dozens-of-underwater-drones-towards-iran/17607/

 http://www.armytimes.com/news/2012/07/ap-military-south-china-sea-us-china-square-off-071212/