Why is T-9 trending?
People are tweeting about Shuttle Endeavour, and T-9 is a countdown for the space shuttle by NASA, which meant nine minutes away.
First trend: May 11 at 19:00 UTC | Last trend: April 5 at 10:05 UTC | Last defined: February 8 at 10:09 UTC | Link: http://wttrend.com/19915