In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: Chuck's city held a festival to honor WWII veterans. Sentence2: He and some friends went to the event. Sentence3: They gave free rides on small engines planes at the event. Sentence4: Reluctantly, Chuck agreed to take a ride. Sentence5: Shortly after take off, the plane had a system problem and crashed.
Friends, Veterans