A SpaceX Falcon Heavy rocket carrying 24 satellites as part of the Department of Defense's Space Test Program-2 (STP-2) mission is seen illuminated by lights at Launch Complex 39A, Monday, June 24, 2019 at NASA's Kennedy Space Center in Florida. Four NASA technology and science payloads which will study non-toxic spacecraft fuel, deep space navigation, "bubbles" in the electrically-charged layers of Earth's upper atmosphere, and radiation protection for satellites are among the two dozen satellites that will be launched. The three hour launch window opens at 11:30pm EDT on June 24. Photo Credit: (NASA/Joel Kowsky)