Final answer:
Delta is a founding member of the airline alliance SkyTeam, established in 2000, not a political or military alliance such as NATO or the Warsaw Pact.
Step-by-step explanation:
The airline Delta is not a founding member of any political or military alliance like the North Atlantic Treaty Organization (NATO) or the Warsaw Pact. Delta is, in fact, an airline company and therefore not related to these types of alliances. It's conceivable that the question may be referring to a different kind of 'alliance' pertaining to airline partnerships. Delta is a founding member of the airline alliance known as SkyTeam. The alliance was established in 2000 and includes various other airline members that collaborate to offer passengers comprehensive flight options and other benefits.