Germany updated its travel advisory for the United States this week, warning of stricter immigration enforcement at the border. The big picture: Upping an advisory for visiting an ally country could be construed as a serious step,

The government of Germany updated travel guidance for people traveling to the United States after three of its citizens were detained in an attempt to enter "the land of the free."

Germany has updated its travel advisory for the United States to emphasize that a visa or waiver allowing entry does not guarantee Germans to enter the U.S. after several of its citizens were