Iranians dance in streets, thank Rouhani for nuclear deal

By Bozorgmehr Sharafedin Nouri and Babak Dehghanpisheh DUBAI/BEIRUT (Reuters) - Young Iranian men and women danced in streets in parts of Tehran and motorists honked car horns to cheer an historic nuclear accord with world powers they hope will end years of economic sanctions and decades of international isolation. In the capital's affluent north, motorists played loud music from car stereos and young people blew South African-style 'vuvuzela' horns, scenes that Tehran normally witnesses only wh