A 21-year-old South African woman has been arrested at the busy OR Tambo International Airport in Johannesburg for drug trafficking, moments after she arrived from Brazil.The South African Police Service (SAPS) on Sunday said the woman became the eleventh drug mule to be arrested at the busy airport in a period of two months.The woman was arrested in a joint operation by the police and the South African Revenue Service (SARS) customs unit.SAPS national spokesperson, Brigadier Athlenda Mathe said the drug mule was profiled and intercepted as she was arriving on a flight from São Paulo,…