11.   When the potent disturbances meet high humidity, the stage is set for deadly tornadoes.

12.   A historic section of Little Rock torn apart by a series of deadly tornadoes a year ago is on its way back.

13.   Amid the rubble of Oklahoma, scientists hope to find clues to unlock the mysteries of deadly tornadoes.

14.   Friday, intense storms churned through the Midwest states of Indiana and Illinois and there were reports of deadly tornadoes touching down in Kentucky and Tennessee.