Live coverage: Indian PSLV launches with RISAT 2B radar satellite

After a four-day delay due to a ground power supply anomaly and unfavorable weather, an Ariane 5 rocket lifted off at 4:23 p.m. EST (2123 GMT) Tuesday to send into orbit a hush-hush communications satellite for the Egyptian military and a spacecraft to expand the capacity of Inmarsat’s mobile Internet service.

United Launch Alliance’s first Vulcan rocket was filled with methane and liquid oxygen propellants at Cape Canaveral last week for a tanking test, but managers decided to move the rocket back inside a hangar for a few adjustments before proceeding with an engine test-firing.

The Atlas 5 rocket blasts off from Cape Canaveral for its pre-dawn ascent to deploy the NROL-52 payload for the National Reconnaissance Office.