What is the missing number?

One day St. Peter saw a street gang walking up to the Pearly Gates.
St. Peter ran to God and said, "God, there are some low-life street gang members at the Gates. What do I do?"
God relied, "Just do what you normally do with that type. Redirect them."
St. Peter went back to carry out the order, but he suddenly came running back and yelling, "God, God, they're gone! They're gone!"
"The street gang?"
"No, the Pearly Gates!"