May fifth, 1789. This was when an event called the French revolution started. This event was essentially people who found their government unfair, and took it down. This lead to the death of thousands of people, a civil war amongst the people, and allowed for a tyrant known as Napoleon to take control. Fast forward to the events today; thousands of people stormed the white house raided the government because they felt it was unjust. The pattern of another countries darkest times are repeating here in the U.S. So, yes, this was a threat to our democracy, but it goes beyond that; this raid was a threat to America itself,
Answer: 1. They shake the ground
2. They travel through solids
3. They vibrate from side to side
Explanation: Hope this helps!