Finding where they were first taken underground isn't the problem. Finding where they were moved to is.
I'm not so sure.
Isreal seem to know exactly what building to hit with a bomb.
That's gone on for years and years now.
They give the occupants of the building a ten minute warning, with something like we know you have terrorists working there, then they blow it up.
Then they have all this high tec equipment to stop bombs getting through.
There the country that must be protected and has been years but yet they cant rewind a tape.
It's shouldn't be this brutal or complicated, it would just be a case of finding exactly what time and location a hostage was seen last by someone and then playing the tape from that point