June 30, 2015 11:15 am White Powder Found in Envelope at Dallas Federal Building Dallas Fire-Rescue says a white powder found inside an envelope at the Earle Cabell Federal Building Tuesday was harmless chalk. Wake Up to Something Good 1:59 Pro-Palestinian protesters return to UT Dallas for peaceful protest 1:37 Opal Lee receives Presidential Medal of Freedom 2:59 Mesquite girls robotics team flexes STEM muscles at VEX Robotics competition 2:44 Dallas, Collin counties see decrease in homelessness since 2015 1:55 Disaster declarations in Southeast Texas amid storms, flooding