North Korea seems capable of firing missiles from pretty much anywhere now, having fired them from 21 sites between 1984 and this Tuesday, according to a report.
Tuesday's ballistic missile that flew over Japan was the first to be fired from a commercial airport, which brought the total to 21, VOA quoted the report from the James Martin Center for Nonproliferation Studies.
Most ballistic missiles were fired from two sites -- the missile bases in Wonsan and Gitdaeryong, both in Kangwon Province -- with 20 missiles launched from each.
Missiles were launched in Wonsan from May 2013 until April 2015, and the base in Gitdaeryong has been in use since July 2006, with the last missile fired from there only last week.
A launch site in Hwadae-gun, North Hamgyong Province was used for 17 missile launches until April 2009, including the first ballistic missile test in April 1984. But no missile has been tested there since 2012.
The CNS's director Jeffrey Lewis told VOA, "The missiles are mobile, so they can really launch them from any place..."