The Mexican government charges customs fees when large amounts of goods are brought across the border.

CNN: 'I couldn't just cross my arms and turn away'

The effect has been somewhat marred in recent weeks by open sparring between Mr Joy Way and the outspoken labour minister, Jorge Mufarech, over the latter's charges of corruption in the customs agency, and Mr Fujimori on April 14th made more cabinet changes.

ECONOMIST: Peru

Last week, Ecuadorean President Rafael Correa ordered US customs attache Armando Astorga to leave on similar charges.

BBC: Ecuador expels second US diplomat