The Pentagon and the U.S. military services have been working on the development of hypersonic weapons.
The Korean Central News Agency says Chairman Kim Jong Un observed the firing of the weapon by the Academy of Defense Science.
The LRSO will replace the AGM-86B Air Launched Cruise Missile according to a top executive who oversees part of the program.
The Army needs ground-breaking war machines to match Russia and China, whose militaries are becoming high-tech terrors.
A small, GPS- and laser-guided precision glide weapon could make its way to the battlefield in a few years.
The U.S. military is turning to some serious firepower to go after Taliban drug labs in Afghanistan.