Israeli Airstrikes Pound Gaza as Calls for Cease-Fire Intensify

Latest developments:

• Rocket sirens blare in several northern Israeli cities, Israeli military says.
• Two Israeli border guards were stabbed Monday in the Old City of Jerusalem. Haaretz reports that the assailant was a 16-year-old who was shot and killed.
• U.N. agencies and international charities have issued a rare joint statement calling for an immediate humanitarian cea