So I’m flipping through the print edition of the Washington Post this morning, skimming the front-page article about the daily lives of our top-ranking national security leaders. After the jump, on page A10, there’s a picture of a guy working out, bench pressing 100-pound dumbbells. Pretty impressive, I’m thinking. I glance at the caption and — holy hell, it’s Adm. Mike Mullen, the 63-year-old Chairman of the Joint Chiefs of Staff! Dude is a beast! The caption says Mullen wakes up every day at 3 a.m., and heads to the Navy Yard gym by 4 a.m., downs a protein shake…