Students from Rutgers Business School–Newark and New Brunswick met Warren Buffett in the fall to learn from the master as part of the investor’s  annual retreat for business-degree candidates. They presented him with the  Rutgers Giving Pledge, promising to support a charity in the investor’s honor.  “It was the best gift you could have given me,” Buffett told John Longo RC’91, RBS’95, a clinical associate professor whose classes were visiting Buffett at his Nebraska home for the fourth time.