9 AM ET: Hostage deal close, Louisiana oil spill, mystery dog illness & more

A hostage deal between Israel and Hamas could be announced as early as today. Police are responding to shootings at a rural area in Colorado and at a Walmart in Ohio. Ukraine appears to be getting closer to EU membership. A million gallons of oil are estimated to have spilled into the Gulf of Mexico. Plus, a mysterious illness is spreading in dogs across the US.

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