Guitarist's 21st LP will feature Paul McCartney, Steve Winwood and more
They perform 'Gimme Some Lovin' and 'Can't Find My Way Home'
Veteran rocker packs in instrumental fireworks at Milwaukee's Riverside Theater
Disc includes collaborations with Eric Clapton, Trent Reznor, Tom Morello and Stevie Winwood
Guitarist covers the Doors, Hendrix and Cream in show with Steve Winwood
Plus: guitarist reveals details of new covers album, potential collaboration with Steve Winwood
Rolling with the "Higher Love" musician
When the Beatles came to America in 1964, the nation was gripped by a phenomenon unseen before
"I don't want anybody to be hung-up ... especially over me, or anything I do"