Following the mass shooting in Connecticut, the Obama administration and lawmakers around the country have promised to re-examine gun control in America.

ProPublica decided to take a look at what's happened legislatively in states where some of the worst shootings in recent U.S. history have occurred to see what effect, if any, those events had on gun laws.

We found that while legislators in Virginia, Alabama, Arizona, New York, Texas and Colorado sometimes contemplated tightening rules after rampage shootings, few measures gained passage. In fact, several states have made it easier to buy more guns and take them to more places.

Here's a rundown of what's happened in each of those states: