Harbor pilots can make $434,000 a year, face high fatality rates, and are responsible for guiding hulking cargo ships into ports

• Harbor pilots are among the highest-paid city employees but it's a risky job.
• The local pilots bring a ship in from miles out at sea to within inches of the port's pier.
• Christopher Mims breaks down how packages arrive at your door within a matter of days in his book, "Arriving Today."

Harbor pilots have one of the highest-paid — but simultaneously riskiest — jobs in the transportation industry.