Spaceflight Now + Subscribe to Spaceflight Now Plus for access to our extensive video collections! How do I sign up? Video archive Delta 4-Heavy launch The first operational Delta 4-Heavy rocket launches the final Defense Support Program missile warning satellite for the Air Force.  Full coverage Dawn leaves Earth NASA's Dawn space probe launches aboard a Delta 2-Heavy rocket from Cape Canaveral to explore two worlds in the asteroid belt.  Full coverage Complex 36 demolition The two mobile service towers at Cape Canaveral's Complex 36 that had supported Atlas rockets for decades are toppled to the ground with 122 pounds of explosives.  Play Atlas 5's NRO launch The United Launch Alliance Atlas 5 rocket lifts off June 15 from Cape Canaveral's Complex 41 on the classified NROL-30 mission for the U.S. National Reconnaissance Office.  Full Coverage Launch of Phoenix The Phoenix lander bound for the northern plains of Mars is launched atop a Delta 2 rocket from Cape Canaveral.  Full coverage Become a subscriber More video		BY JUSTIN RAY Follow the countdown and launch of the ULA Atlas 5 rocket carrying a classified national security satellite. Reload this page for the latest on the launch.