Trackers — These satellites will participate in joint missile-tracking exercises later this year. Enlarge / SpaceX launched a Falcon 9 rocket Wednesday with six missile-tracking satellites for the US military. Two prototype satellites for the Missile Defense Agency and four missile-tracking satellites for the US Space Force rode a SpaceX Falcon 9 rocket into orbit Wednesday from Florida's Space Coast. These satellites are part of a new generation of spacecraft designed to track hypersonic mis...