The US military detected and tracked what it has assessed was a failed North Korean missile launch, a Defense Department spokesman said on Thursday. The launch at 3:33pm on Thursday was detected by U.S. Strategic Command systems, the spokesman said in a statement. According to North American Aerospace Defense Command, the missile did not pose a threat to North America, the statement said. A spokesman for the Strategic Command said he had no details about the type of missile launched. “We’ll probably let North Korea characterize it themselves,” he said.