Click and Clack tapes and live NPR shows entertained the Copper Family for many a long mile on our wonderful trips to the USA. Bob was a great fan. All the folkies seemed to be tuned in to the Tappet brothers, so there was always something to talk about apart from music! As I said somewhere else, in their low-budget way they were intellectually, humorously and technically superior in almost every way than a squillion pound 'entertainment' show like Top Gear.