Formidable U.S.undersea arsenal gives pause to any enemy

Interesting commentary from Walter Pincus in the Washington Post Tuesday:

"Thanks to a 2010 arms control treaty with Russia, beginning in 2018 only 12 Ohio-class SSBNs with 20 of their missiles loaded will be deployed at one time. Each missile will be limited to four or five warheads.
"That means the United States will still have more than 1,000 sub-launched warheads available, with some 320 on ready-to-fire, 24-hour alert on the four subs normally on patrol in the Atlantic and Pacific oceans. Each warhead is at least five times as powerful than the bomb that hit Nagasaki.
"What’s the threat? "