In Scotland we had the Dunblane school shooting in 1996. 16 young kids and a teacher were murdered by a physcopath with legal handguns. Strict gun laws were brought in shortly after.
Fast forward 18 years and the Scottish public were in uproar after it was found that some of the 440 police who were allowed to carry guns in the whole country, were carrying them when they weren't responding to an incident that needed them.
http://www.scotsman.com/news/politi...of-police-carry-weapons-in-scotland-1-3414993
Scotland/UK and USA are obviously very different, but I don't think there was a massive demand for strict gun control in the country before Dunblane. Now we don't even like seeing them on our police.
From an outsiders perspective the USA may need to take baby steps. Even the tiniest bit of tighter control should be celebrated. Make sure it never goes back the way and keep pushing forward. That's how most of the great battles are won, civil rights, woman's rights, gay rights etc.