Golftec, a national chain of teaching centers, sells most of its lessons in multimonth or yearlong packages that include gym-membership-type access to video-enhanced practice facilities.

WSJ: The Wrong Way to Practice Golf | Golf Journal by John Paul Newport

Citi has implemented enhanced procedures to prevent a recurrence of this type of event.

FORBES: Citibank Reveals One Percent Of Credit Card Accounts Exposed In Hacker Intrusion

The National Weather Service issued an initial finding that the tornado was an EF-4 on the enhanced Fujita scale, the second most powerful type of twister.

NPR: Medical Examiner: 24 Dead In Oklahoma Twister