U.S. stock futures were also lower as Japan Prime Minister Shinzo Abe said the government will hold a National Security Council meeting today after North Korea fired four ballistic missiles. The move comes as South Korea and the U.S. undertake annual military drills that Pyongyang has called a prelude to an invasion. Tensions have been rising over North Korea, which also conducted a missile test during Abe’s state visit to the U.S. last month and is suspected of being behind the assassination of its leader’s half brother in Malaysia.