Puzzle:
Teams go to room 361, and get a sheet of transparency paper with numbers, and another paper with color based graphs.
[Solution: Teams realize that this relates to the DC Metro. After realizing this, teams realize that the second paper is a color adjacency graph for 5 different stations. Identifying the stations, and matching these stations up with the numbers on the transparency paper, allows for teams to get the numbers 32 19 31 3 21. Teams go to locker number 3219, with the locker combo 31 3 21, and find the next puzzle. ]
Available Star:
After teams solve the puzzle, and go to the locker, they will find that the back of the lock has a star drawn on it.