A Port Arthur Moment
In 1996, a madman killed 35 people in Port Arthur, Tasmania.  The response included something unexpected from the Prime Minister at the time, John Howard: gun control.

How many mass shooting has the U.S. had now?  Had even just since Columbine?  Had just in the last year?

Mr. President, it's your Port Arthur moment.  The hell with the "fiscal cliff".  Make gun control happen.