KARL PENHAUL, CNN CORRESPONDENT: Hamas has also warned that it has not sat by idle since its last confrontation, and investing in new tactics and technology. It seems that this time around Hamas fighters could be better prepared to fight the Israelis on the ground, and that, of course, would be Israel's worst nightmare for its troops to be bogged down in some kind of Guerrilla war on the Gaza strip -- Brooke.</s>BROOKE BALDWIN, CNN ANCHOR: We will stand by for that response from Hamas. Karl Penhaul, thank you so much in Gaza City tonight. Next, we are remembering the victims on board that flight, Malaysian Air 17, 298 men, women, children, were killed. And today we are learning that an American was one of the people on board. Plus, we'll take a closer look at the weapon, the U.S. officials believe took down this 777 jet. This is called the BUK missile system. How did it hit a plane flying at 32,000 feet in the air? Going hundreds of miles an hour? We'll ask an expert.
Death Toll In Gaza Rises Past 270