Photos: Delta 4 rocket fires off the pad before sunset

A clandestine satellite for the U.S. reconnaissance program was successfully launched by an Atlas 5 rocket today, riding a ferocious torrent of fire and smoke off the pad before disappearing behind a curtain of secrecy.

Northrop Grumman’s Cygnus supply ship set for liftoff Saturday will deliver to the International Space Station the final hardware for a series of ambitious spacewalks later this month to install a new coolant system on the Alpha Magnetic Spectrometer, a $2 billion particle physics experiment seeking the cosmic signatures of dark matter and antimatter.

A Russian Soyuz rocket lifted off from the Vostochny Cosmodrome in Russia’s Far East on Thursday carrying 28 satellites, including a pair of Russian mapping satellites, secondary payloads from Germany, Japan, Spain, South Africa, and a dozen Earth-observing CubeSats and eight commercial weather payloads for Planet and Spire.