
Why would she have to hide anything? She was the boss, anyone who accompanied her would be zip lipped as loyalty and likely knowledgeable about
any subjects that were to be breached.
Your ans is here

As secret services of India, Russia and some western countries were closely monitoring every move on Pakistan's military research, Bhutto had
decided to herself carry the sensitive material to Pyongyang to avoid detection,
I feel sorry that she is dead now might be she be good for India as she meet lots of time to Indian gov when she was in exile ..But dude truth is that
what i posted