The U.S. military says that through “direct engagement” with the Chinese, it’s “secured an understanding” that China’s navy will return an underwater glider seized in the South China Sea. Peter Cook, a spokesman for U.S. Defense Secretary Ash Carter, says in a statement that the U.S. had registered its objection to what the U.S. is calling an “unlawful seizure” of the unmanned submerged device in international waters.