40 years ago, Mark Knopfler and Dire Straits released their 5th album, Brothers In Arms, recorded with radically new recording technology and a new form of music delivery called "the compact disc." The album proved to be so popular that the CD was suddenly all the rage in music, and the album went on to become one of the best selling records in music history. Randy Renaud revisits Brothers In Arms for its 40th anniversary on the Chronicles of Rock.