You see babies being carried out of the rubble in disaster zones, and Christopher was a fit young man.
Today's fighting took place at the edge of the Rafah camp, a rubble-strewn battle zone where Israeli forces have repeatedly demolished refugee dwellings to deny cover to gunmen and to uncover tunnels that the army says are used to smuggle weapons from Egypt.
These attributes may lead to robots that can snake their way through rubble in disaster zones to find trapped people or that can inspect nuclear power plants.
Behind the door was a bombed-out war zone: ashes, rubble, broken beams and the charred remains of a book, "Catch-22".
Two more calls followed, then a long period of failed communication because the phone lines were dead, but finally about 2 p.m. the patient emerged from an extended and indirect excursion through the rubble of the battle zone, in tears and needing tender care.
The Haiti photographs, taken when Barth returned following the 2010 earthquake, include scenes of destroyed buildings, street life, and people among the rubble in the epicenter zone, at Martissant, and in the capital, Port-au-Prince.
I visited the site the day after the explosion and got a view of about 20 feet from the floor-level spot of the blast zone, covered in rubble and dust.
More than a million Syrians have fled the country, 3.5 million more are internally displaced and major cities have been turned into rubble-strewn battle zones.
Opposition activists said government forces unleashed some of the fiercest shelling to date on Homs,Syria'sthird-largest city, sections of which have been turned into rubble-strewn war zones after months of fighting.
