Three senior U.S. military officials have confirmed that North Korea have lost contact with one of its submarines this week. According to U.S. spy satellites, ships and aircraft have monitored the situation over the past week, and observed that the North Korean navy have been struggling to find the missing sub. Usni.org reports: “About week ago it went missing and the speculation is that it sank,” the official told USNI News. “The North Koreans have not made an attempt to indicate there is something wrong or that they require help or some type of assistance.” The official was reluctant to give specific details on the presumed loss of the boat due to sensitivities on how the military was tracking the vessel. A second U.S. official confirmed the basic facts of the missing submarine. Though U.S. officials would not confirm the details of where the ship went down, USNI News understands it was likely near one of North Korea’s two submarine bases on the Sea of Japan, also called the East Sea, Joe Bermudez, an analyst focusing on North Korea and advisor to the website 38 North from the U.S.- Korea Institute at Johns Hopkins University, told USNI News on Friday. [...]