Some reading you might be interested in here;
DOE Courier hiring process - MassCops
I was a courier for about 7 years for high security items.....Best gig I had was to a take a box of "Bolts" for a Boeing 747 from Seattle to Dubai....Was paid very well
to be at the airport and on my way with 2 hrs notice....
In the months leading up to Y2K (1-1-2000), Visa was unsure what would happen to their credit card billing. All customers got a new card in the those few months. Was very busy.