 To compile the report, investigators spent hundreds of hours reviewing WhatsApp messages from residents, Israeli and Hamas radio communications, surveillance videos, aerial footage and interviews with survivors. Meanwhile, CIA Director William Burns is back in the Middle East again this week. He's meeting with top officials from Egypt, Israel and Qatar. With him is President Biden's top Middle East advisor, Brett McGurk. They have one goal to mediate between Hamas and Israel and bring an end to the war in Gaza.