When Samu Qureshi sits down in the middle of his 4,100-square-foot “museum” in Bethesda, the longtime Washington football fan is surrounded by his life’s work.

Best Home Defense Weapon Debate? Security experts will argue, that the 9mm handgun has always passed as an escapee that combines firepower, capacity, and usability.

(Here's how much America's best-selling pistols cost ... much in the way of ballistic performance as a self-defense round. The size of 9mm ammo also allows for more compact firearm designs ...