3 storm chasers killed in crash while tracking tornado

SPUR, Texas — Storms that bore down on Southern Plains states brought powerful winds that upended a tractor-trailer on an Oklahoma interstate, killing the driver, while three storm chasers died in a collision as they raced toward a tornado-warned storm in West Texas, authorities said.The storms that struck Texas and Oklahoma late Tuesday brought tornadoes, tennis ball-sized hail and powerful winds, but no widespread damage was reported. It's just the beginning of what's expected to be a st