As Israel prepares to pull out of Gaza this summer, Palestinians are hoping international donors will step in to help them get back on their feet. Millions of dollars stayed in coffers during the last four years of conflict. That's money that could go toward things like revamping the electrical grid and building a desalination plant. But before greenlighting those projects, some donors have posed a challenge to the Palestinians and Israelis. Work together to fix a particularly odiferous problem, and then get back to us. From Gaza, Nancy Updike has the story.