GM Robert Byrne passed away on Friday, just a week before his 85th birthday. I cannot do his legacy justice; instead, here is a collection of tributes and remembrances on one of the greats of US chess.
Wikipedia does a good job summarizing his career.
ChessVibes has a nice story and playable collection of his games.
USCF has a brief note with memorial service details:
A memorial service will be on Sat., April 20, at 1 PM at Dorsey Funeral Home, 15 M Wilton Place, Ossining, NY 10562. Attendees are welcome. RSVP to firstname.lastname@example.org. You can also send a message to be read aloud.
NY Times, where GM Byrne worked for 34 years as chess columnist, pays their respects.