August 6, 2010 10:54 pm 13 Businesses Receive White Powder in Mail Federal agents are investigating whether or the letters are linked to hundreds of similar mailings since 2008. Wake Up to Something Good 3:15 Attendees on alert at Southlake fest as severe weather threatens North Texas 1:39 Communities clean up after monster tornadoes 0:46 San Marcos Police issue Amber Alert for toddler 2:07 Police looking for murder weapon in Bowie HS shooting 2:10 Southlake's Art in the Square prepares for inclement weather