From the Twitter newsletter:

Bucking The System

Last weekend CNN lead with a big story about James Buck, a
graduate student in journalism from the University of
California-Berkeley who was arrested last month in Mahalla, Egypt
while covering an anti-government protest. Thinking quickly, James
was able to send a one-word Twitter update: “Arrested.” His
followers in Egypt and back in the US reacted by contacting the
university and the consulate on his behalf. Before long, James was
updating Twitter with another one-word message, “Free.”

CNN Story: http://tinyurl.com/4b4hsg