Is the White House satisfied Israel doing everything it can to prevent civilian deaths?

(CNN) - There was renewed fighting in the Gaza conflict today, with Israeli Prime Minister Benjamin Netanyahu pledging "stamina and determination" as both sides launch deadly attacks.

The United Nations has called for an immediate cease-fire, but there is no sign that either side is taking it seriously. And with Secretary of State John Kerry just returning from a grueling week-long campaign to bring the area some peace - without much success - it's becoming increasingly unclear if the United States can do anything to stop the fighting.

White House Deputy National Security Adviser Tony Blinken joined The Lead to discuss this, as well as the investigation into the shoot down of Malaysian Airlines Flight 17.