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- A $61 billion package of US military aid for Ukraine is being signed off.
- The aid will provide much-needed support for Ukraine over the summer months.
- But it still faces massive challenges in its battle against Russia's invasion.
Relief swept the front line in Ukraine on Saturday after the US voted to release a long-delayed $61 billion package of military aid to help defend against Russia's invasion.
"We thought that our partners had forgotten about us," a Ukrainian intelligence officer with the call sign Bankir, told CNN.