What puzzle do people "go to pieces" over?

Joe Rosenthal's Pulitzer-winning photo, the model for the Marine Corps War Memorial, shows a flag-raising in which batt… Which Pulitzer Prize-winning poet had the middle name St. Vincent? A pupil of Friedrich Froebel founded the first U.S. example of which kind of school in Watertown, Wisconsin, in 1856? Which Madonna hit includes the line "touched for the very first time"? A quarrel that began over fencing judging at the 1924 Olympics was settled by which kind of fight? Which quarterback wore No. 10 for the Minnesota Vikings? Which quarterback wore No. 16 for the San Francisco 49ers? What word names a quick kiss or part of a primitive typing style?