Westport to Ring NASDAQ Closing Bell and Holds Investor Day in New York May 24th

~ Natural Gas-powered Ford F-250 Displayed in Times Square; Presentations and Video Available on Westport Website Following Event ~ VANCOUVER, May 24, 2012 /PRNewswire/ - Westport Innovations Inc. (TSX:WPT / NASDAQ:WPRT), the global leader in natural gas engines, today announced...