"Johnny died due to complications from diabetes, which resulted in respiratory failure," Cash's manager, Lou Robin, said in a statement issued by Baptist Hospital in Nashville.
Thursday was a crappy day, as John Ritter also passed away unexpectedly while working on his TV show.
One very interesting tidbit that was on NPR this morning, but I can't find references of on Google yet, is the statement that while in the Air Force, Johnny Cash was a codebreaker. This would make Johnny the Alpha-Geek, and most beloved, as the original codebreaking Man in Black.
Music Legend Johnny Cash Dies at 71