Complex sentence: In the year following the attack, there were seizures of postal shipments seeking to intercept Medfly larvae, as well as the searching of 61,731 passengers and 2,430 cargo shipments entering through airports, but no larvae were discovered.
Split into simpler sentences: In the year following the attack, there were seizures of postal shipments which sought to intercept medfly larvae. In addition, 61,731 passengers and 2,430 cargo shipments were searched entering through airports, but no larvae were discovered.