The annual Bang on a Can Marathon is happening again today at the World Finncial Center Wintergarden in lower Manhattan. They've been at it since noon, and will be going all the way til midnight tonight. Highlights still to come: JACK performing Xenakis' Tetras (4pm) indie duo Buke and Gass (630pm), and a special appearance by Living Colour guitarist Vernon Reid (8pm) performing his own Ghost Narratives. Closing out at 11pm tonight will be Michael Gordon, David Lang and Julia Wolfe's Shelter, performed by Signal with film by Bill Morrison.