The Azov Sea off Crimea has become increasingly militarised and seen tense exchanges between Russian and Ukrainian coastguards. Jonah Fisher joins the Ukrainian Navy in these troubled waters. Kate Adie introduces this and other stories from around the world. In Colombia, Simon Maybin meets a group of Venezuelan migrants who’ve turned to busking on the streets of Cucuta in the hope of raising enough money to feed their starving families back home. In Hungary, Nick Thorpe visits Mohacs where invading Ottoman forces defeated those of the Kingdom of Hungary in the 16th century. What can it tell us about relations between Turkey and Hungary today? In Spain, Lottie Gross finds herself mesmerised by competing towers of people at the 27th Concurs de Castells in Tarragona. And in Brussels, Adam Fleming takes a break from reporting the negotiations on Britain’s withdrawal from the EU to play ‘Brexit the board game.’