I am always encouraged when a service takes that extra step to ensure security is taken care of. As I am flying across the U.S. on my Delta flight to Los Angeles I needed to log into Facebook to reply to comment from a friend.
When I browsed to Facebook.com I was presented with this prompt after entering my credentials:
Well I was definitely not in my normal location as I was 6 miles above the Texas Panhandle.
Nice Work @Facebook.