One of the two powerful bombs shipped to Chicago-area synagogues nearly slipped past investigators even after they were tipped off.
A United States official said the British authorities originally found no explosives in their sweep of cargo at the East Midlands airport in central England. After the authorities in Dubai discovered a bomb there, however, the British investigators restarted the search and found the second bomb.
The official spoke on condition of anonymity because he was not authorized to speak to reporters.
