what are the risk mission cards?
['Capture Europe, Australia and one other continent.', 'Capture Europe, South America and one other continent.', 'Capture North America and Africa.', 'Capture North America and Australia.', 'Capture Asia and South America.', 'Capture Asia and Africa.', 'Capture 24 territories.', 'Capture 18 territories and occupy each with two troops.']