Why no Cannons on Police Helicopters?

Dweezil Dwarftosser wrote:

Jim Doyle wrote:

"Jim Yanik" wrote:
SNIP
Well, there is a definite historical culture clash between Brits
and Americans concerning personal ownership of firearms (and that
alone is hard to overcome) - but it actually goes much deeper than
the legal mechanics of private gun ownership.

SNIP

This should be qualified.

The culture clash is only over hand guns and using firearms for self
defence (as a first line over and above getting out of there).

In the UK (also NZ) there is a long history of owning long arms (rifle,
shotgun), and basically they are 'easy' to buy.

In NZ you can use a firearm for self defence... but you must be 'in fear
of ....' for yourself or others. Using deadly force to protect property
is frowned upon. If you do shoot someone... if you shoot them in the
back, expect the police to take you to court. If the person is shot in
the front, depending on circumstances (anything short of fatal), the
police will not proceed. If the shooting is fatal a court (coroners)
must determine whether there is a case to answer. Historically, for a
shot in the front, while in fear of injury case, the court finds
self-defence.

The UK operates in a basically similar way.