Hamas-Run Gaza Ministry of Health: 212 people killed and 1400 injured in Gaza; White House: U.S. working through "quiet and intensive" diplomacy to end Israeli-Palestinian violence; Sources: Biden admin notified congress of $735 million weapons sale to Israel before current violence began; New mask guidelines creating confusion; CDC Chief says going maskless an "honor system." To learn more about how CNN protects listener privacy, visit cnn.com/privacy