It isn't too much of a surprise, given that three of the four reunited this fall to play a concert for Barack Obama, but the surviving members of the Dead are giving it another go, launching a 19-date tour this spring that stops in Chicago on March 5 with a show at the All State Arena. As with their 2004 reunion shows, Bob Weir, Phil Lesh, Bill Kreutzmann and Mickey Hart will play with Allman Brot...