Bertolt Meyer pulls off his left forearm and gives it to me. It’s smooth and black, and the hand has a clear silicone cover, like an iPhone case. Beneath the rubbery skin are skeletal robotic ...

“Let It Be Me” and “Gina” were crowd favorites, along with “Days of Wine and Roses.” Mathis also performed some of his more emotional tunes, including the iconic “Moon River” and a cover of The ...