let's figure that half of them were arriving and half were leaving. so that's fifteen million.

fifteen million is a little more than 40,000 a day... almost 2,000 an hour. there are quite a few security gates, but let's assume a security gate can handle two people a minute, you'd need about 15 gates functioning at that rate to handle the passengers. now each gate is manned by three or four guards, and for argument's sake lets say there's one manager for every six guards, so that's sixty people full-time, round the clock. the real number is probably more, definitely not less. and it doesn't include the cops and tow truck drivers and people monitoring the closed circuit cameras, or the special guards who "interview" selected passengers, but never mind them...

60 people x 24 hours x 365 days = 525,600 hours spent screening.

the security check adds an average of what, twenty minutes to boarding? it's probably more, but let's call it twenty.

15,000,000 x 1/3 hour = 5,000,000 hours being screened.

5,000,000 + 525,600 = 5,525,600 hours per year spent by passengers and screeners. at dulles.

let's say an average american's life expectancy is eighty years. maybe it's more, maybe less, but we'll call it eighty.

80 years x 365 days x 24 hours = 700,800 hours life expectancy

5,525,600 hours spent ÷ 700,800 = 7.88 entire lifetimes spent screening at dulles every year.

say the total air traffic of all the airports is thirty times that of dulles... it's probably significantly more, but call it thirty, then this security consumes about 200 lives a year. a 757 has 182 seats.

of course some of the assumptions above could be off by an order of magnitude or more, on the low side.