Surveillance video of a shooting inside the Walmart store in North Versailles earlier this month was introduced in court Thursday.The video was played at a preliminary hearing for Rojanai Alston, 22, of Penn Hills, who was ordered to stand trial on a charge of aggravated assault.The video shows Alston being attacked from behind by two women and repeatedly punched before pulling the gun from her purse and firing the weapon.One woman was injured in the shooting, which happened on the night of July 5.