Symbols of common men coming together.

[wacki]

The most obvious one is the revolutionary war and the gadsden flag:




There are also the firemen of 9/11



Then there are the massive amounts of donations made by Americans each year but there's not exactly an appropriate symbol for that.

What are some really good symbols of everyday people coming together to overcome some enormous difficulty?

I'm posting this in politics because I figure the anarchos would be all over this kind of stuff.