President Joe Biden asked Congress on Thursday for about $33 billion in additional security and economic assistance for Ukraine as it faces the ongoing invasion from Russia.

In a Thursday address from the White House, Biden announced he had submitted the request to Congress. “The cost of this fight is not cheap, but caving to aggression is going to be more costly if we allow it to happen,” Biden said. “We either back Ukrainian people as they defend their country or we stand by as the Russians continue their atrocities and aggression in the Ukraine.”

Biden said “it’s critical this funding gets approved and approved as quickly as possible.”