United States and Russian leaders concluded their summit in Alaska, describing the talks as 'productive' and 'positive', but did not reach a concrete agreement to end the conflict in Ukraine. Meanwhile, the United Nations reports that over 1,700 Palestinians have died while seeking aid in Gaza since late May. African leaders are calling for world maps to more accurately represent the continent's true size. In other news, the fossilised remains of Lucy, a human ancestor dating back more than 3 million years, are set to go on tour.