Glenn Kessler, The Washington Post
President Obama came into office saying he wanted to demonstrate that engagement with hostile nations is more effective than antagonism, but North Korea's nuclear test now leaves the young administration with critical choices about its response.
Does it ramp up the pressure with new and tougher sanctions? Does it not overreact and essentially stand pat? Or will it, like the Bush administration after North Korea's first test in 2006, shift course and redouble efforts at engagement and diplomacy?
Henry D. Sokolski, Forbes
The Obama administration has just got a multi-kiloton blast of reality from North Korea's second test of a nuclear weapon. The president responded immediately, declaring the U.S. would "stand up to this behavior" and would "redouble" its efforts" to create a "more robust international nonproliferation regime."
Dan Blumenthal and Robert Kagan, The Washington Post
The North Korean launch of its Taeopodong-2 missile and its second nuclear test have laid bare the paucity of President Obama's policy options. They have exposed the futility of the six-party talks and, in particular, the much-hyped myth of China's value as a partner on strategic matters.
Andrew E. Kramer and Matthew L. Wald, The New York Times
Russia, already a large supplier of nuclear-reactor fuel to Europe and Asia, is expected on Tuesday to sign its first purely commercial contract to supply low-enriched uranium to United States utilities.
Mark Lavie, Associated Press
Venezuela and Bolivia are supplying Iran with uranium for its nuclear program, according to a secret Israeli government report obtained Monday by The Associated Press.
Zahra Hosseinian, Reuters
Iran has told world powers including the United States talks on its nuclear program must wait until after the Islamic Republic's presidential election on June 12, President Mahmoud Ahmadinejad said on Saturday.