ذلك كل مالدينا لتسلق السياج على فرض ان القنبلة لن تنفجر فجاة بعد ذلك علنا الوصول للسلك لنفجره
That's how long we have to climb the fence, assuming the bomb doesn't spontaneously combust, then we still have to get to the tether, set the explosive, and hope the charge is strong enough to actually cut it.