By ABC News, April 05, 2017

North Korea fired a newly developed powerful ballistic missile into its eastern waters Wednesday, U.S. and South Korean officials said, amid worries the North might conduct nuclear or long-range rocket tests ahead of the first summit between President Donald Trump and his Chinese counterpart Xi Jinping this week.

The initial U.S. and South Korean assessments indicated it was a KN-15 medium-range missile, whose first publicly known test in February was considered by many foreign experts as a potentially worrying development. It uses solid fuel already loaded inside the missile, which would shorten launch preparation times, boost the weapon's mobility and make it harder for outsiders to detect the signs of its liftoff.