Russia And China Are Sprinting To Catch Up With The US's Advanced Submarine Fleet

Read more: http://www.military.com/daily-news/2014/10/23/cno-warns-of-advanced-russian-submarine-development.html#ixzz3H5whNilk

http://www.businessinsider.com/kris-osborn-russia-is-developing-advanced-submarines-2014-10