Israel Vows Response to Deadly Hamas Attack as U.S. Urges Restraint

Israel suffered highest ever casualties from Hamas attack in Gaza, vows strong response.

U.S. urging restraint but limited options to help restore calm. Focus is on supporting Israel.

Attack complicated by Hamas holding hostages, including Americans.

Iran likely played role supporting Hamas, hoping to expand conflict.

U.S. moving naval forces to Mediterranean, providing Israel additional military equipment.