Russia announced it's walking away from an agreement that allows Ukrainian grain shipments to leave Black Sea ports. The deal brokered by the UN and Turkey in 2022 has helped guarantee grain shipments from Ukraine to countries around the world. And, the European Union announced a deal with Tunisia over the weekend to stem the flow of migration. Tunisia has now stated it will only take back Tunisians who illegally crossed into Europe. Also, US Climate Envoy John Kerry heads out on a four-day visit to Beijing. Chinese and US officials are motivated to find solutions to the dangers climate change poses, but domestic pressures are making it difficult to hammer out a deal. Plus, two surprise victories at Wimbledon.