College students use social media to aid wrongfully detained Americans

ViewThe Shargi family says every day without Emad Shargi adds to the pain.

"It's horrific. It's maddening," said Emad's sister, Neda. "It's beyond anything that I could ever imagine."

Emad Shargi is an American citizen and businessman. Five years ago, he traveled to Iran to visit family. He never returned.

"He's an...