Some kudos to the US Postal Service. I sent Express Mail to a PO Box for Saturday delivery. Saturday comes and I realize that the post office is only open from 8 to 10:30, but delivery is only guaranteed by 3pm. Oops.
So I look up the Post Office and notice that a local number is available. With skepticism I called the local number. 3 rings later I'm talking to a small-town Postmaster. She knows the recipient, takes the tracking number and promises to call back. 15 minutes later she has found out where it was and promised to receive it after hours and deliver it.
Shocked I ask her what can I do to thank you. Her response is simple - "The mail must go through!".