Protesters shout slogans as a Star of David burns at a protest against Israeli attacks on Gaza, in front of Israel's Embassy in Ankara on December 28, 2008. Israeli tanks massed at the border with the Gaza Strip, as Israel warned it could launch a ground attack in addition to its aerial bombardment of Hamas targets in the enclave. Dozens of tanks and armoured personnel carriers were massing at different locations along the Gaza-Israel border, AFP photographers and correspondents reported. Israel called up 6,500 reserve soldiers as Defence Minister Ehud Barak warned that it could send in ground troops in addition to a mammoth air bombardment unleashed on Hamas-run Gaza on December 27 in retaliation for continuing rocket fire. The air strikes have killed more than 280 Palestinians and wounded more than 600 others in less than two days, according to Gaza medics. AFP PHOTO / ADEM ALTAN (Photo credit should read ADEM ALTAN/AFP/Getty Images)