Robert “Madyar” Brovdi is a chain-smoking former grain broker who is now Ukraine’s top drone commander. Our correspondent visited an underground command point to report on how Mr Brovdi and his drone brigade have been taking out Russian soldiers faster than the Kremlin can recruit them.

The world has become acutely aware in recent weeks of how vital the Strait of Hormuz is to the international flow of oil and gas. Read this piece to learn about other maritime chokepoints around the world, from the Panama Canal to the Taiwan Strait.