SWAT officers put police techniques and equipment through a stress test. Included: a look at how sensor-equipped dummies respond to less-than-lethal weapons, including rubber bullets; water cannons; and stunt hand grenades.
A look at martial-arts fighting techniques inspired by the animal kingdom, including the flesh-tearing "tiger claw" attack. Also: Scientists analyze the striking speed of a kung fu fighter compared to that of a rattlesnake.
Scientists monitor elite Special Forces soldiers to study their ability to push their bodies to excel beyond most human limitations. Included: An Air Force pilot and an Army Ranger are spun in a gyroscope to test their ability to fight spatial disorientation; a Navy SEAL is weighed down in a pool.