Beluga is the most expensive type of which delicacy?

Borne by nearly 2.4 million people in the 2000 census, what was the most common surname in the U.S.? The Belarusian language has also been known by which "colorful" name? Which pope, known as "Good Pope John", reigned from 1958 to 1963? What does "LEO" stand for when describing satellites flying at altitudes below about 1,200 miles? Ben & Jerry's named a flavor after which rhyming-named 1960s counterculture figure, a clown famous for his role at Wood… In which 2003 romantic comedy does Ben Affleck play a low-level thug who falls for a gangster played by Jennifer Lopez? Which character did Ben Affleck play in 2002's "The Sum of All Fears"? In which subject did future Federal Reserve chairman Ben Bernanke earn his Ph.D. from MIT?