Weapons

 The United States is the biggest seller of weapons through official channels and through the dark web. The amount of money made by manufacturers and sellers is staggering.

Terrorists get their weapons, one way or another, from US, Russian and Chinese sources. 

Think of all the terrorist groups throughout the world. They don’t make their own weapons.

Weapons sales are often tied to drug sales.

So US weapons sales can result in drug deals which bring drugs back to US users.

The money to be made is irresistible, and the likelihood of any reasonable control is tiny. 

Stopping the flow of weapons would mean stopping their production. 

Now go back to the first sentence.