Clad in elaborate headdresses representing dragons and wizards, Myanmar's ethnic Pa'O fire huge, homemade rockets into the sky – an annual call for plentiful rains and a chance for a windfall of cash. The Pa'O are one of the largest of the country's minority groups, numbering around 1.2 million people and living mainly in Shan state's highlands.They are overwhelmingly Buddhist but many intertwine animism with their faith, believing they descend from a she-dra