Airport security  Kirsten Platt of Seattle, Wash., right, has
her bags checked by Transportation Security Administration
Supervisor Don Walsh, left, before boarding a Cape Air flight.
(By Joe Crocetta, Staff Photographer)  There was the walk-
through metal detector. There was the X-ray machine for carry-on
bags. There were even patdowns for passengers who preferred not
to walk through the detector.  But in other ways, airport
security in that now long-ago world of "pre-9/11" was a
different animal, said Barry Waggy, a former station manager for
US Airways Express at Hagerstown Regional Airport.  "Back then,
you could carry a pocket knife, as long as the blade was less
than 4 inches," Waggy recalled.  And the time the screenings
took?  "Hagerstown was notorious," Waggy said. "You could arrive
10 minutes before your scheduled departure and get on a plane.
But those days are gone."  For him, as for airline passengers
and workers at dozens of different institutions, from schools
and courthouses to business mailroo