Tim McGraw, Chris Pratt and Selena Gomez were just a few of the stars to speak out on the Texas school shooting, where 19 children and two teachers were killed during an attack at Robb Elementary School on Tuesday. At least 17 people were also wounded by the gunman, who used an assault rifle and was killed by responding police.The shooting in Uvalde, Texas, is now the third most deadly school shooting in American history following the Sandy Hook Elementary School shooting, where 28 people were killed in 2012, and the Virginia Tech shooting, in 2007, where 33 people died.