This is usually played a half step down

Intro

e----2---2---0---0---
b---3-3-3-3-3-3-3-3--
g--4---2---0---0-----
d--------------------
a--------------------
e--------------------

thats pretty much it, but when u hear him strum and then let it ring, he's
strumming a Bm then G.
Ex: Bm       G
    How long,how long must we sing this song.......
So just strum and let it ring on those parts.

 The solo is a little more complicated, so i won't try to tab it right now, but will at
some point and add it to this....
Good luck with this great song.