NEW : Fighting nears densely populated Gaza City , witnesses say . Sources : Egyptian artillery ignites buildings , killing 49 and wounding a week later . Leader of Israel rocket teams is killed , Israel says . Share thoughts , reactions to crisis in the Middle East . Israeli jets apparently violate Israeli airspace .
NEW : Fighting nears densely populated Gaza City , witnesses say . Sources : Egyptian artillery ignites buildings , killing 49 and wounding a week later . Leader of Israel rocket teams is killed , Israel says . Israeli jets apparently violate Israeli airspace .