In the month since a gunman killed 17 students and teachers at Marjory Stoneman Douglas High School in South Florida, the country has grappled with its relationship with guns.

There has been a sustained intensity as teenage survivors sparked an activist movement, demanding reform and calling for an assault-weapon ban. Students from thousands of schools across the country marched out of class Wednesday in solidarity. Under pressure, the Republican-controlled Florida legislature this month voted to increase the minimum age to buy a firearm to 21, among other changes — defying the National Rifle Association.

And public opinion is shifting. A Gallup poll released Wednesday found that 67 percent of adults say there should be “more strict” laws covering the sale of firearms, up seven points since October and 20 points since 2014. It’s the highest level of support since 1993, the year just before Congress banned assault weapons for a decade.

As part of a new, occasional series of stories, The Washington Post dispatched reporters across the country to talk with six Americans about assault weapons.