Washington (AFP) – An 11-year-old girl told horrified lawmakers Wednesday of smearing herself in her murdered classmate’s blood to play dead during the most chilling in a spate of gun massacres that have convulsed the United States. Miah Cerrillo, a fourth grader at Robb Elementary School in Uvalde, Texas, recounted for a House of Representatives committee the moments when 19 of her fellow students and two teachers were killed by a teen gunman last month. She recalled how her class had been watching a movie and scrambled behind their teacher’s desk and their backpacks when the shooter burst in…