An explosion is seen after an Israeli air strike in the southern Gaza Strip town of Rafah near the border with Egypt on January 13, 2009. Israeli troops and Hamas fighters fought fierce battles in the streets of Gaza's main city on Tuesday as Israel's war on Hamas entered its 18th day and the death toll spiralled above 900. AFP PHOTO/SAID KHATIB (Photo credit should read SAID KHATIB/AFP via Getty Images)
