Ok, one came first on a passenger plane. This could explain the lack of cargo planes coming from Yemen. But what about the other one? The one which apparently was NOT on a passenger plane first?
Also, what was intended, to blow up a plane? Why send the package on a multiple plane route? And if the bomb was already on several planes, why didn't they detonate it? Why address the bombs to Synagogues in Chicago? Who would be able to read an incinerated package blown up at 30,000 feet?
Also is it common that passenger planes carry cargo? Why then bother screening passenger luggage so carefully if the cargo isn't? It makes sense to offload luggage of passengers who don't show up, but what about all that cargo being sent unaccompanied?
From The Guardian.
Qatar Airways statement comes as Yemen arrests female university student on suspicion of sending two mail bombs
One of the two mail bombs found on US-bound cargo aeroplanes had travelled on two separate passenger flights before being found, a spokesman for Qatar Airways said today.