CAPE CANAVERAL, Fla. – On Cape Canaveral Air Force Station's Launch Complex 17-B in Florida, workers check the first stage of a Delta II rocket before it is lifted into the mobile service tower. The rocket is the launch vehicle for the STSS Demonstrators Program. STSS Demonstrators Program is a midcourse tracking technology demonstrator and is part of an evolving ballistic missile defense system. STSS is capable of tracking objects after boost phase and provides trajectory information to other sensors. It will be launched by NASA for the Missile Defense Agency on July 29. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – The first stage of a Delta II rocket arrives on Cape Canaveral Air Force Station's Launch Complex 17-B in Florida. The rocket is the launch vehicle for the STSS Demonstrators Program and will be raised and lifted into the mobile service tower for processing. STSS Demonstrators Program is a midcourse tracking technology demonstrator and is part of an evolving ballistic missile defense system. STSS is capable of tracking objects after boost phase and provides trajectory information to other sensors. It will be launched by NASA for the Missile Defense Agency on July 29. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – On Cape Canaveral Air Force Station's Launch Complex 17-B in Florida, the first stage of a Delta II rocket is lifted off its transporter. It will be raised to vertical and lifted into the mobile service tower for processing. The rocket is the launch vehicle for the STSS Demonstrators Program. STSS Demonstrators Program is a midcourse tracking technology demonstrator and is part of an evolving ballistic missile defense system. STSS is capable of tracking objects after boost phase and provides trajectory information to other sensors. It will be launched by NASA for the Missile Defense Agency on July 29. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – On Cape Canaveral Air Force Station's Launch Complex 17-B in Florida, the first stage of a Delta II rocket is raised to vertical before it can be moved into the mobile service tower for processing. The rocket is the launch vehicle for the STSS Demonstrators Program. STSS Demonstrators Program is a midcourse tracking technology demonstrator and is part of an evolving ballistic missile defense system. STSS is capable of tracking objects after boost phase and provides trajectory information to other sensors. It will be launched by NASA for the Missile Defense Agency on July 29. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – On Cape Canaveral Air Force Station's Launch Complex 17-B in Florida, the first stage of a Delta II rocket is ready to be lifted into the mobile service tower. The rocket is the launch vehicle for the STSS Demonstrators Program. STSS Demonstrators Program is a midcourse tracking technology demonstrator and is part of an evolving ballistic missile defense system. STSS is capable of tracking objects after boost phase and provides trajectory information to other sensors. It will be launched by NASA for the Missile Defense Agency on July 29. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – On Cape Canaveral Air Force Station's Launch Complex 17-B in Florida, the first stage of a Delta II rocket is prepared to lift it into the mobile service tower for processing. The rocket is the launch vehicle for the STSS Demonstrators Program . STSS Demonstrators Program is a midcourse tracking technology demonstrator and is part of an evolving ballistic missile defense system. STSS is capable of tracking objects after boost phase and provides trajectory information to other sensors. It will be launched by NASA for the Missile Defense Agency on July 29. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – On Cape Canaveral Air Force Station's Launch Complex 17-B in Florida, the first stage of a Delta II rocket is lifted into the mobile service tower. The rocket is the launch vehicle for the STSS Demonstrators Program. STSS Demonstrators Program is a midcourse tracking technology demonstrator and is part of an evolving ballistic missile defense system. STSS is capable of tracking objects after boost phase and provides trajectory information to other sensors. It will be launched by NASA for the Missile Defense Agency on July 29. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – The first stage of a Delta II rocket arrives on Cape Canaveral Air Force Station's Launch Complex 17-B in Florida. The rocket is the launch vehicle for the STSS Demonstrators Program and will be raised and lifted into the mobile service tower for processing. STSS Demonstrators Program is a midcourse tracking technology demonstrator and is part of an evolving ballistic missile defense system. STSS is capable of tracking objects after boost phase and provides trajectory information to other sensors. It will be launched by NASA for the Missile Defense Agency on July 29. Photo credit: NASA/Jack Pfaller