Armstrong says American attack confronts the world with difficult options . Sanctions have failed , military action could be disastrous ; talks the least bad choice , he says . Pyongyang may be trying to show it 's a force to be reckoned with , Charles Armstrong says . Talks could reveal what it will take to get North Korea to abandon nukes , he says .
Charles Armstrong says North Korean attack confronts the world with difficult options . Sanctions have failed , military action could be disastrous ; talks the least bad choice , he says . North Korea may be trying to show it 's a force to be reckoned with , Armstrong says . Talks could reveal what it will take to get Pyongyang to abandon nukes , he says .