March 12, 2012 5:14 pm Letter Containing White Powder Sent to DeSoto Doctor A letter containing white powder was delivered to a doctor in DeSoto Monday, but Dallas hazmat crews determined it wasn’t a dangerous substance. Wake Up to Something Good 3:37 Texas tornadoes caught on video 7:16 Severe storms bring tornadoes, flash flooding, hail and lightning to North Texas 4:27 ‘My house, gone,' Texas resident recounts returning home after reports of a tornado 1:12 WATCH: Texas gorilla caught ticking her baby during adorable mother-son moment 3:28 Protesters arrested during pro-Palestine rally on the UT Austin campus