An analyst says he does n't find North Korea 's claim to be credible . `` It was politically impossible for them not to react '' to South Korea , a professor says . South Korea announced a deal with the U.S. to extend its missile range to include the North . But they have not demonstrated that capability , '' said Daniel Pinkston of the International Crisis Group 's North East Asia Program . The agreement is expected to go into effect in 2016 and will allow Seoul to launch an offensive strike on any target within striking distance of Pyongyang.
An analyst says he does n't find North Korea 's claim to be credible . `` It was politically impossible for them not to react '' to South Korea , a professor says . South Korea announced a deal with the U.S. to extend its missile range to include the North . The agreement is expected to go into effect in 2016 and will allow Seoul to launch an offensive strike on any target within striking distance of Pyongyang.