The Chairman of the U.S. House Armed Services Committee, Mac Thornberry, says he is "very skeptical" that North Korea will follow through and denuclearize.<br /> Speaking to Fox News on Sunday, local time, the Republican from Texas said the North has a history of manipulating world opinion. <br /> And with the international sanctions against the regime, Chinese pressure, and President Trump's unconventional rhetoric,... it may be attempting a PR offensive -- particularly to divide the U.S. from its allies in South Korea. <br />Thornberry added that the U.S. needs to prepare for the worst... by strengthening its defense posture, including modernizing nuclear deterrent and enhancing its military capabilities in the region. <br />