Bono: "Europe will be no more" if refugee crisis isn't dealt with
Speaking during U2's Turin concert, Bono admits "we don't know the answer", but emphasises leadership
U2 stream new 'Song For Someone' video
Clip available to watch via Facebook for 24 hours
U2 appear on tribute podcast 'U Talkin' U2 To Me'
Band give interview to hosts Scott Aukerman and Adam Scott
Bruce Springsteen performs with U2 at band's final show of New York residency - watch
The Boss joined Bono and co onstage for 'I Still Haven't Found What I'm Looking For' and 'Stand By Me'
Edge and Adam Clayton gatecrash U2 fansite’s 20th anniversary party – watch
Guitarist and bassist play two songs with U2 tribute band in New York
U2 joined onstage by Lou Reed's widow and woman who dialled 911 when Bono crashed his bike
Paul Simon also joined the band at Madison Square Garden show in New York
Lady Gaga joins U2 onstage to perform 'Ordinary Love' at New York show - watch
The band are currently in the middle of an eight-date residency at Madison Square Garden
U2 frontman Bono to launch his own range of sunglasses
Singer joins charity campaign to provide better eye care
Jimmy Fallon and The Roots join U2 onstage as Paul McCartney attends New York concert - watch
Nile Rodgers and Alicia Keys were also in the crowd for the show
U2 perform 'October' live for first time in 26 years - watch
The performance took place in New York on Saturday (July 18)