One of the long-standing traditions of distributed computing projects is the formation of teams.
Not just a tradition,
a little healthy competition encourages active participation,
to the general gain of the project.

Team USA was created to show we have American pride and that good ol' American know-how is still a reality.
If you're a patriotic American, this is the team to join.
If you're not an American at all, you're still welcome.
This has always been a country with open arms.