MacArthur High School in Irving, TX displayed a sadly paranoid and probably racist reaction to clever student Ahmed Mohamad's home-made clock. The school confiscated his clock, had him taken away in handcuffs, and suspended him for several days. They compounded their foolishness by blaming the child.
President Obama, though, turned this shameful episode to good with one tweet:
Cool clock, Ahmed. Want to bring it to the White House? We should inspire more kids like you to like science. It's what makes America great.