Cleared for takeoff

Right. The clock is running. ETA form LHR to MIA is October 30. Course starts Tuesday November 2. Time to drag the books out, dust off the pen and calculator and do a little study. Or.....procrastinate a little longer. As an aside I walked into a convenience store the other day that advertised itself being open 24/7. So I asked the clerk behind the counter. '' You're open 24 hours a day, 7 days a week , 365 days a year, right ? '' ....''Yes''....came the reply. '' Rightio then why is that you have locks on the front door ?''