In the movie, "Argo", it depicts a CIA operative putting together a rescue attempt of six US diplomats being held in Tehran, Iran ...during the 1979 hostage crisis.

Whether it be Para-rescue ---Special Activities Division, Delta Force, or Navy Seals ...some form of SMUs, Special Mission Units, though planning attempts to minimize risk ---risk is involved.

And just like the fireman who risks his life to save yours, you are not satisfied if there is a family member of yours still in there.  Your plea is, "My 9 year old daughter is still in there!"

The fireman may have given his all to get you out, but your words to him strike the core of his resolve.  As he and the building are both about to collapse, he goes back in there.