Suse,

Besides learning to fire a gun (including pistols, submachine guns, light, medium and heavy machine guns, anti-aircraft guns such as the Polsen and the 20 and 40 mm Bofors, anti-tank guns and missile launchers) I also became proficient at setting anti-personnel and anti-tank mines (and, of course, finding and reclaiming them [the scary part!] I also did anti-terrorism training along with utterly safe encoding and I was sometimes able to observe the toughening up procedures used to harden some of our troops to interrogation methods known to be used by the then Iron Curtain countries (and Britain as it turned out).
So Suse, I do know a bit about anti-terrorist training, outdated though it may be.

I am heartened therefore that a known opponent of the carrying of arms by civilians has had a change of heart,

"n a 60 Minutes interview scheduled to air November 22, Washington DC police chief Cathy Lanier said taking out the gunmen in a Paris-style attack is the “best option” for citizens between the time they call 911 and the moment police arrive.

Lanier said citizens basically have three options–they can “run, hide, or fight.” And she said choosing to “take the gunman out” is the best option if the citizen is in a position to do so.

According to CBS News, Lanier said, “If you’re in a position to try and take the gunman down, to take the gunman out, it’s the best option for saving lives before police can get there.” She admitted that such advice runs “counterintuitive” to what police have been saying for decades, but she stressed that the situation has changed.

Lanier said: “We always tell people, ‘Don’t…don’t take action. Call 911. Don’t intervene in the robbery’…we’ve never told people, ‘Take action.’ [But] it’s a different…scenario.”
http://www.breitbart.com/big-government/2015/11/22/dc-police-chief-best-option-citizens-take-paris-style-attackers/