Dietzel studied history in college, and on weekends he gives tours of the Freedom Trail, in Boston.

NEWYORKER: Battleground America

Then Dietzel told me to go wash my hands, to get the gunpowder off, while he went to clean the gun.

NEWYORKER: Battleground America

Every day, Dietzel goes to work and, at some point, has to hand a gun to a perfect stranger who has never used one.

NEWYORKER: Battleground America

Dietzel is a skilled and knowledgeable teacher, steady, patient, and calm.

NEWYORKER: Battleground America