A Palestinian man digs in sands to extract gravels in Beit Lahia town northern Gaza strip, on May 9, 2010. Israel's embargo on construction materials supply into Gaza has forced Palestinians to seek alternative sources. [Xinhua]

Palestinians collect gravels from sands in Beit Lahia town of northern Gaza strip, on May 9, 2010. Israel's embargo on construction materials supply into Gaza has forced Palestinians to seek alternative sources. [Xinhua]