As the hard-won progress in hypersonic propulsion technology can attest, the road to sustained air-breathing engines that can operate above Mach 5 is littered with five decades worth of failed tests, some more dramatic than others.

Officials target U.S., Russia, China with Soviet-era capability

Hundreds of applications for aircraft operations and repair stations are held up, stymied by the FAA's inefficient certification processes, a government watchdog finds. FAA is juggling 1,029 such applications, Jeffrey Guzzetti of the Transportation Department's Inspector General's office, recently told Congress. The situation is so bad, one applicant has been in limbo since August 2006. And it is about to get worse, as requests from NextGen technologies and unmanned aircraft flow into the system.

Defense, Space & Security unit generates $33 billion in annual sales

May clear commercial crew milestone despite landing-gear failure

Julie Robinson, who oversees U.S.-side science on the International Space Station (ISS), names a one-time dark horse as her No. 1 research result to date from the orbiting laboratory. Medical researchers started running experiments in space more than a decade ago to see if working in microgravity would make it possible to encapsulate cancer drugs in tiny bubbles that could be targeted on specific tumors in the body. It turns out that it was, as the crew of ISS Expedition 5 discovered in 2002.

The Center for New American Security (CNAS) recently released a report entitled “Game Changers: Disruptive Technology and U.S. Defense Strategy.” That study considered additive manufacturing (3-D printers), autonomous vehicles, directed energy, cyber capabilities, human performance modification and other emerging technologies that the center believes need to be factored into U.S. security policy and planning.

Upcoming fights in Congress will look a lot like old ones.