April 2, 2007 — -- As high school and college cheerleaders face increased pressure to perform gravity-defying leaps and flips, they are becoming vulnerable to permanent injury -- even death.

But as its popularity thrives, cheerleading has evolved into feats of complex maneuvers, lofty basket tosses and human pyramids as tall as some small buildings. Safety regulations can limit the ...

In this challenge, extreme cheerleading stunts defy gravity. 3 police officers shot 'without warning' while responding to ...