R.E.M.'s Mike Mills on Vinyl Singles Set: 'We Never Planned on Hits'

In the three years since R.E.M.'s amicable split, the band has allowed itself an occasional moment of nostalgia, but this year has brought the most activity from the group yet: the Record Store Day set Unplugged: The Complete 1991 and 2001 Sessions followed by a documentary comprised of footage MTV shot of the...