Please answer a question about the following article about Steven Spielberg:

In 2002, Spielberg was one of eight flagbearers who carried the Olympic Flag into Rice-Eccles Stadium at the Opening Ceremonies of the 2002 Winter Olympic Games in Salt Lake City. In 2006, Premiere listed him as the most powerful and influential figure in the motion picture industry. Time listed him as one of the 100 Most Important People of the Century. At the end of the 20th century, Life named him the most influential person of his generation. In 2009, Boston University presented him an honorary Doctor of Humane Letters degree.

What honorary degree did Spielberg receive from Boston University?
Doctor of Humane Letters