Try making a 17 minute connection in PHL from the F Terminal to A Terminal on an INTL FLT...Yuck!

1552 Flight Arrives at Gate, First Off
1555 Get Carry on Bag, sprint to the Shuttle Bus from F to A
1607 Arrive at Terminal A, sprint to the gate while texting to a friend...find out the flight was delayed from 1615 to 1625 for Weight & Balance on Cargo
1614 Arrive at the Gate holding up my id and passport and said "Damn Mesa"