$1:
While a military response from either the United States or South Korea is unlikely, U.S. officials say they are considering a variety of options, ranging from U.N. Security Council action to additional U.S. penalties
Anything less than a military solution is too lenient.
Sanctions have not done jack to resolve this problem. Time to take it to the next level.
$1:
There is also concern an aggressive response could trigger the collapse of what is arguably the world's most isolated and authoritarian regime, U.S. officials said.
And their collapse would be... bad?