SSN-774 Virginia-Class Submarine

Project cost: $93.3 billion

FY 2013 estimate: $4.3 billion

SSN-774s are nuclear-powered attack submarines equipped for special forces teams. At 377 feet long and capable of topping 28 miles per hour, the submarines cost about $2.5 billion each, according to the Navy’s website and the Congressional Budget Office. Virginia-class subs made a cameo in the 2012 presidential election after Republican candidate Mitt Romney said the Navy was too small during his major foreign policy speech in October. Romney wanted to increase SSN-774 production to three per year, from the planned two.