The whole thing is strange. Why blow up cargo? Unless they were going to do it to spread nbc over a highly populated area.
Not long back a lady called in to Michael Savage’s program and she said her fear is someone infecting themself and getting on a plane. By the time we figure that out lots of people would be sick.
Not only that why address the packages to Jewish Synagogues, which might get more attention from security, if you intended to blow up the plane? A more benign address would make more sense.