The effect of assault weapons is much greater in children, as the surface area of their organs and arteries are smaller, said Dr. Joseph Sakran, a trauma surgeon at Johns Hopkins Hospital.
After mass shootings in Buffalo and at a Texas school, Jacobs said he would vote for a federal assault weapons ban if he had a chance. His comments sparked a furious reaction from conservatives,
The political climate has changed drastically since a 10-year assault weapons ban passed in 1994. The lack of political will and other barriers stand in the way of it even coming to a vote today.
Gunfight author Ryan Busse was once a rising star in the gun industry. But he became disillusioned after Columbine when, he says, the NRA began to use "fear and conspiracy and hatred" to boost sales.
Advocates face steep odds getting a new ban through Congress. If they can succeed, they hope to avoid a repeat of past mistakes that left the original law open to loopholes.