Sharp Difference Between UK and US

We all fear the mega terrorist attack.  We cannot forget 9/11, or the Paris massacre.  Fortunately, the greater the need for coordination and movement of people and material, the greater the chance of detection.

The home grown, self-radicalized terrorist is the dangerous needle in a haystack.  His only resources are his unbalanced mind, his focused hatred, and the weapons he can buy or assemble.   In today's attack in England, the weapons were a car and a knife.  Do we have any doubt, that in America, an assault rifle would have multiplied the carnage?

European gun control laws partially defang lone wolves.