Three men walked into a jewelry store in the mall. One had a sledgehammer, and he smashed a display case in front of the jewelry store employee. A store security guard shot at the man as he grabbed the jewelry and ran off. The other men ran away as shoppers watched in horror; the two men stole a mall employee's black Jeep Liberty and drove away. No shoppers were injured. Has a robbery or burglary been committed? Explain.