U.S.embassies give serious warnings to visa applicants about social media.

Some U.S. embassies in Europe are using social media to warn visitors. They are telling people to be careful about what they do while in the U.S.

The embassies are using pictures of important U.S. leaders like President Trump. They are warning that people who break the law could be deported.

One message says that the U.S. will not allow people who support terrorism. It also says that people who cause trouble will be sent back home.

The U.S. government is being stricter about who gets a visa to enter the country. Some students and professors have had their visas taken away for protesting.

The U.S. says it has the right to decide who can come into the country. They are using social media to make sure everyone knows the rules.