After being the monopoly rocket supplier to the U.S. government for national security launches for nearly 10 years, the tables have turned for United Launch Alliance.

Our pick of the week's top aerospace and defense news, including Virgin Galactic's rocket engine breakthrough.

Though the bulk of ULA’s work is still with the U.S. government and will remain so for years to come, CEO Tory Bruno is posturing the company to be more competitive in the commercial market.

"A flawless six hour journey for the Progress 61 vehicle, every step of the way," said Rob Navias, NASA public affairs officer, from the agency's Mission Control, where Thursday's Russian Progress launch and docking were monitored.

Spectroscopic data from NASA’s Mars Reconnaissance Orbiter have confirmed that dark streaks appearing on Martian slopes are the result of liquid water.

This week's top aerospace and defense stories, including Norway's first F-35A and Boeing's bulk Chinese aircraft order.

New imagery of Pluto by the New Horizons probe includes some spectacular shots collected about 15 min. after closest approach.

U.S. President John F. Kennedy is well known for the 1961 speech to Congress in which he made the Apollo program a national goal.