People in this article were arrested for trying to break a barrier and throwing projectiles. It’s really hard to get arrested in the US for speech alone. As a person from an actual authoritarian county, sorry, you don’t really get to play the victim here.

AC means Alternating Current, electrical current that periodically reverses direction, and DC means Direct Current, a current that continuously flows in one direction. AC/DC on a socket means it can take both types of power.