EU intensifies tests on rules for member countries to assist during crises. Confidence in U.S. commitment to NATO and European security wanes under Trump. Middle East and Ukraine wars divert U.S. attention. Leaders test EU Article 42.7 for aid during aggression. Cyprus leaders plan operational plan using military and trade assets. EU conducts table-top exercises in mid-May to simulate invasion responses. EU's Article 42.7 activated once after 2015 Paris attacks