Stephanie Kwolek: The chemist who invented Kevlar
On the morning of Dec. 21, 2012, Pennsylvania State Trooper Timothy Strohmeyer was pursuing a man who had just murdered three people. With Strohmeyer and other police closing in, Jeffrey Lee Michael…
On the morning of Dec. 21, 2012, Pennsylvania State Trooper Timothy Strohmeyer was pursuing a man who had just murdered three people. With Strohmeyer and other police closing in, Jeffrey Lee Michael…