Hamas's number one demand, above all other exports, is concrete and construction material - even before Cast Lead. They use it to build tunnels, barracks, and fortifications. Look at the tonnage of building materials received in Gaza and the results. Look at the monies received to build up infrastructure before Cast Lead and at the results.
Surfer seriously injured in Australian shark attack (AP)
from the article: Rights groups: World has betrayed the citizens of Gaza