By 1989, the only way for the Grateful Dead to get to Sullivan Stadium in Foxboro, MA , which was deservedly notorious for its massive traffic jams, was by helicopter. From the sky it seemed as though there were Deadheads packed tight for miles in every direction. It was borderline spooky, part and parcel of the post-“In the Dark” GD, where we counted any show that wasn’t a disaster as a victory. And the astonishing reach of the crowd, as far as the eye could see, was even more impressive considering that this flight was quite early, so that Jerry Garcia and Bob Weir could film something with the opening act, our friends Los Lobos.