North Korea tested rocket engine in late April, U.S. think tank says

North Korea is believed to have conducted a test of a liquid propellant rocket engine in late April, a U.S. think tank said based on satellite imagery and knowledgeable sources.The Center for Strategic and International Studies said Monday the unannounced test was carried out during the fourth week of April at the Yunsong vertical engine test stand within the Sohae Satellite Launching Station.The Washington-based think tank said the test is a clear indication North Korea is advancing its development of more sophisticated long-range ballistic missiles, space launch vehicles and satellites.Th…READ FULL ARTICLE