That probably has to do with the detection tools they have. I imagine a bomb is hard to spot if it doesn't look like this: http://i.imgur.com/WyY4d4f.png http:/

That probably has to do with the detection tools they have. I imagine a bomb is hard to spot if it doesn't look like this: http://i.imgur.com/WyY4d4f.png http://i.imgur.com/WyY4d4f.png