"Terrorists may attack with little or no warning, targeting tourist locations, transportation hubs and other public areas," according to the State Department alert.
Klee was one of the foremost artists of the 20th century.
About 35 percent of German and 20 percent of French people said they had faith in Vladimir Putin.
The letter allegedly urged the German government to "fundamentally rethink" its support for a range of organizations, including the Jewish Museum in Berlin.
Harvard said the German chancellor will be its principal speaker at the ceremony next May.
Ukrainian President Petro Poroshenko said that the number of Russia forces at the border had "grown dramatically."
"Especially on a day like Black Friday, employees should be the central focus," a union representative said.
"Some things last forever, others not for an hour," German police said.
"There are too many powers that wish to thwart us," French President Emmanuel Macron warned in a speech before the German parliament.
The German chancellor's support of French President Emmanuel Macron's calls for a unified European force came as U.S. President Donald Trump criticized the idea, mocking France's loss to the Nazis in World War II.
"You are Madame Macron," a elderly woman told German leader Angela Merkel. "I am the chancellor of Germany," the head of state replied.
Heiko Maas believes the return of Democrats to power in the House of Representatives could lead to greater cooperation from the United States when it comes to international affairs.
The classes would stress "fundamental values such as democracy and the treatment of women in our society."
Macron said Merkel "has never forgotten what Europe's values are and she leads her country with great courage," referring to her announcement as "extremely dignified."
The German chancellor informed the Christian Democratic Union of her decision after a disappointing result in Hesse regional election.
New York Democratic congressional primary winner Alexandria Ocasio-Cortez compared the "existential threat" posed by climate change to that of Nazi Germany during World War II.
Pushing back against the idea, Merkel criticized a proposition, saying it limits the freedom of members of the German parliament, known as the Bundestag.
State police, which issued a series of tweets about the incident, confirmed officers had to use pepper spray and their batons on some attendees.
On the nuclear deal, Germany sides with Iran against the U.S. and Israel, but it is wary of Tehran's other ambitions across the Middle East.