Last week, 97% of you knew about the 150th anniversary of the Transcontinental Railroad, but only 54% knew that Salt Lake City and multiple airlines will pay more than $10 million to replace security machines at the airport. Think you kept up with the news this week? Take our quiz to find out. A new one will post every Friday morning. You can find previous quizzes here. If you’re using The Salt Lake Tribune mobile app, click here.