CMOS FAQ: Like Leno's Jaywalking, but for Copy Editors

Remember how someone at some point told you that there's no such thing as a stupid question?

Well, they were wrong.

June Questions and Answers

Q. Is there a period after an abbreviation of a country if it is terminating a sentence? “I went to U.K..”

A. Seriously, have you ever seen two periods in a row like that in print? If we told you to put two periods, would you do it? Would you set your hair on fire if CMOS said you should?

— Chicago Style Q & A