Led by flautist/vocalist Ian Anderson, Jethro Tull mixes hard rock, blues and folk for a style that defies easy analysis; this has not, however, dissuaded fans from giving them 15 gold and 5 platinum albums. As the band embarks on their 31st year, their groundbreaking LP from 1971 reappears (Aqualung remains to this day one of the most cohesive concept...