As we reported earlier tonight, the nuclear test by North Korea has provoked stiff backlash — both in the U.S. and among the U.N. countries. President Obama spoke this evening with his South Korean counterpart and the two agreed on the recklessness of the North Korean nuclear test. The President repeated America’s commitment to protecting South Korea. And the U.N. Security council will now work on new, binding resolutions. So tonight, we ask: Are resolutions and sanctions enough? Even if previous efforts have proven futile? And if not, what is the appropriate action? Tell us what you think. And you can follow "Nightline" anytime on Twitter: http://twitter.com/Nightline.