Featured by David Axe
Autonomous Flying Ambulances Could Save Troops
When thereâ€™s no safe escape, call in the Mules: These unmanned aerial vehicles could save lives on the battlefieldâ€”and off
Semper Fly: Marines in Space
A proposed suborbital space transport will put boots on the ground anywhere in the world in two hours or less. But can it overcome huge technological-and political-hurdles?