Billy Joe Shaver once told Waylon Jennings, "I just want you to at least listen to these songs. And if you don't, I'm gonna kick your ass right here in front of God and everybody." Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Members of the American Guild of Musical Artists and the American Federation of Musicians, two of the unions embroiled in contract negotiations with Metropolitan Opera management, rally this morning at Dante Park across from Lincoln Center. Jeff Lunden/for NPR hide caption

itoggle caption Jeff Lunden/for NPR