North Korea launched a possible intercontinental ballistic missile on Monday morning in what analysts said indicated the growing reliability of the reclusive state’s illegal weapons program.

The missile launched Monday exhibited the range to hit anywhere in the United States, according to a preliminary assessment from the Japanese Defense Ministry.

“The ICBM-class ballistic missile launched this time, if calculated based on the trajectory, depending on weight of warhead, could have a flying range of over 15,000 kilometers (9,320 miles), meaning the whole of the US territory would be within range,” Shingo Miyake, parliamentary vice-minister of defense, told reporters at a news conference in Tokyo.