KPCC:
The test is a major milestone for the U.S.’s Ground-based Midcourse Defense (GMD) system and program as it marks their second consecutive successful test. It comes at a time where sabre-rattling between the U.S. and North Korea has increased in recent months with regards to launching missiles. Pyongyang has overseen at least a dozen missile tests already this year, so Tuesday’s successful launch is somewhat of a show of strength by the U.S…