What is the main idea of this news item? [br] [originaltext] (23)On a visit

(23)On a visit to Turkey, Vice President Joe Biden on Saturday called for increased openness around the world, arguing that political and social freedoms create economic opportunities. Biden spoke at the Global Entrepreneurship Summit, hosted in Istanbul, (24)whose goal is to promote entrepreneurship and facilitate innovation and private enterprise. The changes that are happening in the Middle East and North Africa in the so-called Arab spring will create a new creative atmosphere in those places, Biden said.