The custom officer's eyes opened wide. She was viewing an x-ray image of my two suitcases. Both were packed with plastic containers small and large, all double-wrapped individually and each carrying a soft mass in clear liquid. “Are you bringing fresh cheese?” she asked me. It was June 2012, and I was returning from South Africa to Brazil through the international airport in São Paulo. A Portuguese couple ahead of me had just been caught sneaking in prohibited fresh cheese, which could contain live pathogens harmful to local cattle.