U.S. President Barack Obama has stepped up hostilities against Venezuela, declaring the country a threat to the national security of the U.S. In Argentina, ten people died in a helicopter crash, including a group of french sports stars participating in a reality tv show. Hundreds of protestors stormed the capitol building in Madison, Wisconsin demanding justice in the police killing of 19-year-old Tony Robinson. Greek finance minister Yanis Varoufakis arrived in Brussels for a special eurogroup meeting to discuss Greece's reform proposals. In the UK, foreign secretary Philip Hammond said that Russia could pose the greatest threat to Britain's security.