Slingshot Documentary Attempts to Solve World’s Water Problems, GNG Dinner and a Movie, March 17

Slingshot is about Segway inventor Dean Kamen, an indomitable man who just might be creating a solution for a crisis affecting billions. A quirky genius, Dean Kamen lives in a house with secret passages, a closet full of denim and a helicopter garage. His latest passion is the SlingShot water purification system, actually a 15-year quest to obliterate half of human …