If you want to distribute them legally you'll need a sync license for the music unless you limit yourself to public domain stuff (e.g. Sousa marches, World War I music, and the like). You may be able to convince some patriotic songwriters to let you use their music for $1, but you'll have to negotiate a license; a compulsory license (which would get you by for $0.08/copy) won't let you put graphics with the music.
OTOH, perhaps there's a Freeper who whas written some comparatively-unknown music post-9/11 who'd like to donate it to the cause?