China, the United States’ main rival, unveiled two new stealth aircraft designs in December, demonstrating surprising progress in its fighter technology. Other adversaries have produced large numbers ...

Israeli fighter jets have been seen armed with inexpensive glide bombs. Air superiority means it doesn't need to expend costly standoff missiles.

What You Need to Know: The USS Theodore Roosevelt, a $4.5 billion Nimitz-class aircraft carrier, was “sunk” in a 2015 war game by a comparatively inexpensive French Rubis-class submarine, the ...