Long-overdue air war turns tide in war on Islamic State.
Yeager's supersonic flight shaped the future of flight.
Monument to honor servicemembers who have fought the 'campaign of campaigns.'
In the next two decades, an energy-independent United States could change the global security environment.
Support grows for standing up a new branch of the U.S. armed forces.
In the age of sequestration, spending cuts outrank national security needs.