"Five percent nationwide are affected by sinus and ear problems
daily. These groundings all have a commonality of being directly
related to our current flight schedules. Our health is being eroded
at an alarming rate."
Source: From a memo sent last year from the
Federal Air Marshal Service field office in Charlotte, NC, stating
the day-to-day rigors of sitting for hours onboard commercial
airline flights may be taking a disturbing toll on air
marshals.