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The question is often asked in the somber aftermath of a shooting massacre: how many deaths will it take before America changes its gun laws?

And while a political solution remains elusive, mass killings such as those in Charleston, Chattanooga and Lafayette continue with alarming frequency across the U.S. — a recent study found one occurs in America every two weeks.

But for Australia, a single massacre changed everything.

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Image: Martin BryantMartin Bryant pleaded guilty to all 35 murders at Port Arthur. Reuters

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http://www.nbcnews.com/storyline/charleston-church-shooting/port-arthur-massacre-shooting-spree-changed-australia-gun-laws-n396476

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