Killing of Hamas leader casts shadow over Gaza ceasefire deal

As tensions escalate over the killing of Hamas leader Ismail Haniyeh in Iran on Wednesday (July 31) and threaten to derail talks for a ceasefire in Gaza, U.S. Secretary of State Antony Blinken said Washington played no part in the assassination, and that diplomats are still working on brokering a truce between Israel and Hamas. Diane To reports.