NASA selects 15 finalists for end-of-shuttle commemorative patch contest

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My patch represents the following:

The large stars represent the 14 crew members lost.
Small stars represent the 50 states.
The Space Station and Hubble are depicted to represent 2 of the major shuttle program objectives Several other small satellites could also be added.
The 3 smaller shuttles represent 3 operational phases, launch, on orbit and landing. A 4th could be added to represent ground processing.
The background globe represents the participation and support by other nations.