It is 15 years since the birth of Kim Il Sung, grandfather of North Korean leader Kim Jong Un. April 4 is regarded as the "nation's biggest holiday" in North Korea.
North Korea just announced its first test of the launch of a new solid-fuel ICBM, the Mars 13, which can be launched more quickly than conventional liquid fuel type. It has been pointed out that North Korea may launch its first military reconnaissance satellite in violation of the U.N. Security Council resolution.