Bomb transported on passenger jets

Qatar Airways has confirmed that a bomb discovered in Dubai was carried by two of its passenger jets through Doha.
 
The head of the airline has told Al Jazeera it is doing its best, but there simply is not much more that can be done, to detect such bombs.
 
The bomb that was found in a Fedex parcel in Dubai came from Yemen. Another bomb ended up at East Midlands Airport in the UK, on a UPS flight. The final destination of both bombs was Chicago in the US.

Al Jazeera’s Dan Nolan reports from Dubai.