Paul,

"what percent of US teachers are well trained and proficient in the use of pistols?"

Haven't got any idea, but I'd imagine that those teachers who had served in the Armed forces would know how to use one.

"And would it be compulsory for the well trained and proficient to carry a gun?"

No compulsion, purely voluntary.

"Would they take it home at night, keep it on weekends and holidays etc?"

Of course, they would, unlike Australia, most US policemen are trusted to be armed off duty and civilians with concealed carry permits are allowed to be armed at all times.
And any US citizen, who is not a convicted felon, may carry a pistol or a long arm openly at any time, it's guaranteed by the Second Amendment.

"How many right wing nutters hold a gun licence?,"

Generally, there are no licences.

//Generally, there are no licences.//

Does that not bother you?

A man needs a licence to drive a car; in order to obtain that licence he must demonstrate that he can operate an automobile in a manner that is not likely to endanger the lives of others. He must demonstrate that he is proficient in the operation of an automobile, for a given value of proficient.

Surely it's reasonable to expectation that before be allowed to wield a firearm, he must at least demonstrate that he can operate it in a manner that is not likely to endanger the lives of others and be reasonably proficient in its use.

Is that unreasonable? I don't think that's unreasonable. Then again, I don't worship at the same church Mr. Iceberg lettuce does:

http://www.youtube.com/watch?v=Je_EWam-MiA

Tiger,

It doesn't bother me in the least, there is a licence for concealed carry of a pistol, with appropriate training etc.

There are no licences for long arms, apart from fully automatic weapons.

We modeled our laws in part on Canadian laws, Canada has now abandoned licencing of long arms as being an impractical waste of time and resources, and have abolished the relative firearms registry and destroyed all records.

On Sunday March 11th 2018 SBS will be showing
Michael Moore's documentary - "Bowling For
Columbine," which explores America's
predilection for gun ownership. The film will
be screened at 8.30pm.

Then at 10.40pm - "Gunned Down" will be shown.
This is an investigation into the NRA.

Both might be worth watching.

//It doesn't bother me in the least//

Why on Earth not? Would you be happy to have unlicensed drivers sharing the road with you?

Great doco, if you haven't seen it well worth a watch. Love MM's work,

http://www.youtube.com/watch?v=DC2QaWmat7A

http://www.youtube.com/watch?v=jY2PzzjO3zo&list=PLZbXA4lyCtqo9eWfXNHrarW1W9DLi0B2Z