This is apparently from a show on 3/31/01, in Café Beracah, Lebanon, PA, with Squad Five-0, Luti-Kriss, and The Kick. The shows review was here, and quite wisely refers to one-21 as "one of the most under-rated Christian punk bands".
These are all from "BreakThru Festival", which was apparently July 29th, 2000, in Philadelphia, PA at Eastern College. Again, I found these pics on decapolis.com, which must therefore be a good place, and this is the page they came from.