The evening of May 10, 1970, found a young Watt M. Casey Jr. standing awestruck, only a few feet from Jimi Hendrix as the legendary guitarist tore into his unique arrangement of “The Star-Spangled Banner” on the stage of San Antonio’s Hemisphere Arena during the Texas leg of his Cry of Love Tour. Bemoaning the fact that he had no camera to document the amazing experience or the visionary musicians creating it, Watt promised himself that he would make up for his oversight in the weeks and y...