Spain's parliament ratified the entry of Finland and Sweden to the North Atlantic Treaty Organization (NATO) on Thursday, bringing the two Nordic countries one step closer to joining the alliance in its most significant expansion since the 1990s as it responds to Russia's invasion of Ukraine.
Sweden and Finland applied for membership in the 30-nation alliance in response to Russia's Feb. 24 invasion. Russia has repeatedly warned both countries against joining the alliance and calls its actions in Ukraine "a special military operation."
