AM frequencies (medium and short waves) with the right propagation and time of the day condition travel well beyond the horizon, following the Earth curvature,

AM frequencies (medium and short waves) with the right propagation and time of the day condition travel well beyond the horizon, following the Earth curvature, without the need for repeaters in the middle. That's how people in non free countries can get news coming from abroad while all their local FM, TV, internet and cellphones are heavily censored. There are some good reasons to keep AM working.