military exercises on Venezuelan soil that President Nicolas Maduro called a sign of strengthening relations. Two Russian air force planes landed in Venezuela's main airport on Saturday carrying a Russian defense official and nearly 100 troops, according to a local journalist, amid strengthening ties between Caracas and Moscow. A flight-tracking website showed that two planes left from a Russian military airport bound for Caracas on Friday, and another flight-tracking site showed that one plane left Caracas on Sunday. Reporter Javier Mayorca wrote on Twitter on Saturday that the first plane carried Vasily Tonkoshkurov, chief of staff of the ground forces,...