Cold war times.
Check it out:

House Homeland Security Committee Chairman Michael McCaul (R-Texas) raised the specter of “submarine warfare” from Russia while making comments on the downing of Malaysia Airlines Flight 17.

McCaul, speaking on CNN, said an impending threat from the Kremlin “could involve submarine warfare” as Russian President Vladimir Putin seeks to regain global power.

“Mr. Putin is returning to a Cold War mentality,” McCaul said. “You said this nationalistic pride [in Russia], a resurgence to regain the glory of the old days … It’s not the Al-Qaeda threat, but it’s the threat of brute force.”