A former Myanmar beauty queen has joined ethnic rebels to take up arms against the country's military junta, posting photos of herself with an assault rifle.Myanmar has been in chaos and its economy paralysed since the military seized power on 1 February, ousting civilian leader Aung San Suu Kyi.Htar Htet Htet represented Myanmar in the first Miss Grand International beauty pageant in Thailand in 2013, competing against 60 contenders in swimsuit and national costume rounds.Fast forward e