As warmer weather approaches — and vaccination rates rise while COVID-19 numbers decline — it had seemed, up to this point, as though Americans would be turning out in droves during the spring and summer seasons to take their long-awaited “postpandemic” vacations. But now, given Russia’s ongoing attack on Ukraine, traveler sentiment in the U.S., as well as actual travel logistics, has seemingly been impacted by a conflict that’s broken out on the opposite side of the globe. Given the interconnectedness of today’s world, such an assault on foreign soil can feel strangely close to home. And, if …