Business News Twitter co-founder Evan Williams leaving board Twitter co-founder and one-time chief executive Evan Williams is stepping down from the board, leaving the one-to-many More… Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Abu Dhabi-backed Virgin Galactic takes crew to altitude of 55 miles 1 killed, 2 wounded in explosion in Nepal capital