Last year, North Korea test fired a ballistic missile. That test failed, as the missile never left the territory of North Korea.
North Korea ballistic missile test fails, NBC News confirms – CNBC, 2017/04/28
North Korea test-fired a ballistic missile on Saturday in local time, but the missile exploded soon after launch, U.S. officials told NBC News.
The officials said that the failed test involved a short-range, non-nuclear missile, which would be able to hit Seoul, but not Japan.
Well, it has come to light concerning where that test missile ended up.
When a North Korean Missile Accidentally Hit a North Korean City – The Diplomat, 2018/01/03
On April 28, 2017, North Korea launched a single Hwasong-12/KN17 intermediate-range ballistic missile (IRBM) from Pukchang Airfield in South Pyongan Province (the Korean People’s Army’s Air and Anti-Air Force Unit 447 in Ryongak-dong, Sunchon City, to be more precise). That missile failed shortly after launch and crashed in the Chongsin-dong, in North Korean city of Tokchon, causing considerable damage to a complex of industrial or agricultural buildings.
The missile never flew higher than approximately 70 kilometers. The location of the missile’s eventual impact was revealed exclusively to The Diplomat and evidence of the incident can be independently corroborated in commercially available satellite imagery from April and May 2017.