In article ,
"M. J. Powell" wrote:

There has been a bit of a furore over here concerning the new US
requirement to airlines to supply air marshals when requested. The
concern is mainly over the possible puncture of a pressure cabin.
What do readers think is the result of decompression via a bullet hole?

Unnoticeable is almost all cases. A mild annoyance in the remainder, as
long as we're discussing smallarm-caliber rounds.