Critics of safe trade argue that the military and agriculture aspects of biosecurity are dissimilar, unlikely to converge in the form of an attack disguised as an accident, and require such differential prevention and response measures that there is little risk reduced in altering the fundamental structure of trade relationships to accommodate a robust regime of biosecurity. Such critics usually argue instead that emergency services' biodefense measures are sufficient to handle outbreaks of any diseases or alien organisms, and that such outbreaks are unlikely to be long sustained or deliberately masked as agricultural accidents. This, to the advocates, seems like wishful thinking.