Germany has updated its travel advisory for citizens heading to the United States following several incidents involving the detention of German nationals. Three citizens were detained by U.S. authorities, prompting concerns from the German Foreign Office about the implications of U.S. immigration policies. Reports reveal that some German tourists faced extended detentions, with one individual, a green card holder, remaining trapped in ICE custody. The situation has led to a broader warning, with Germany monitoring the cases closely and investigating multiple incidents at the U.S. border. Officials have cautioned travelers that U.S. visa and ESTA do not guarantee entry, echoing sentiments that many other countries are now expressing regarding travel to the U.S.