, it's a new song, it's raising funds for (RED) to fight AIDS and you can download from iTunes
. Downloaded it already? Tell us what you think in the comments below.
And check out this film from the studio with the band laying down the track and Bono recalling ideas and inspiration behind it. 'The early lyrics were set on a train coming into London for the first time. I remember sleeping in Euston station, being broke... coming out of the subway into the spring of 1979, being 18 years old, it was punk rock in London...'