Q&A with Tory Bruno, president and chief executive of ULA

Just three weeks after the Delta 4-Heavy rocket left the launch pad on its way to a successful satellite-deployment mission for U.S. national security, a smaller booster in the family has rolled out for its August military flight.

Eric Boe, one of three astronauts assigned to the first piloted test flight of a Boeing CST-100 Starliner commercial crew ship later this year has been removed from the mission due to unspecified medical issues, NASA announced Tuesday. He will be replaced by veteran astronaut Mike Fincke.

An Atlas 5 rocket has been rolled out to its launch pad at Cape Canaveral for blastoff to deploy a replacement satellite to strengthen the Global Positioning System for U.S. military forces and the worldwide economy.