"Sometimes, if you stand on the bottom rail of a bridge and lean over to watch the river slipping slowly away beneath you, you will suddenly know everything there is to be known."
Winnie the Pooh
... about international boundaries.
Tonight I will be on a flight headed south to Costa Rica to try to meet up with the little gray birds I became acquainted with last summer. Like them, I will travel at night. Unlike them, I need a passport.