Witkoff calls Hamas response to ceasefire "totally unacceptable"
Negotiations over a Gaza ceasefire and hostage exchange deal continue with Middle East envoy Steve Witkoff calling Hamas' response "totally unacceptable." Israel has denied involvement in an attack near a food aid distribution center where hospital sources tell CBS News at least 51 people were killed. Meanwhile, desperation for humanitarian aid in Gaza continues. Imtiaz Tyab has the latest.