“WILLIE NELSON SAT DOWN MID-SONG — AND KACEY MUSGRAVES KNELT BESIDE HIM.” He’s 92. The guitar still in his lap, Trigger worn soft from sixty years of hands. Halfway through “Are You Sure,” Willie eased himself down onto the stool — slower than usual.
“WILLIE NELSON SAT DOWN MID-SONG — AND KACEY MUSGRAVES KNELT BESIDE HIM.” He’s 92. The guitar still in his lap, Trigger worn soft from sixty years of hands. Halfway through “Are You Sure,” Willie eased himself down onto the stool — slower than usual. The crowd held its breath. Kacey didn’t say a word. She…