What does "LEO" stand for when describing satellites flying at altitudes below about 1,200 miles?

Bellini's 1831 opera "Norma" had its world premiere at which Milan opera house? 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? Beluga is the most expensive type of which delicacy? 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"?