Palestinian firemen operate on a fire at a building used by Hamas members which was hit during an Israeli strike in Gaza City, Jan. 3, 2009. The Israel Defense Forces Saturday evening began its ground incursion into the Hamas-controlled Gaza Strip, vowing to destroy "terror infrastructure" of Hamas. And more than 450 Palestinians has been killed and some 2,300 wounded during Israeli ongoing intensive airstrikes since Dec. 27, 2008. [Xinhua]