President Donald Trump is defending his executive order that bans people from seven Muslim-majority countries from entering the United States. The order was signed by Trump on Friday. It puts a 90-day entry ban on people from Iraq, Iran, Syria, Somalia, Sudan, Libya and Yemen. It also prevents refugees from entering the country for 120 days. Trump has repeatedly called for more controls on U.S. immigration to improve national security and prevent terrorists from entering. His administration has said U.S. policies used to investigate people coming into the United States from certain countries will be reviewed while the current ban is in place. Thousands of people protested the order at U.S. airports and other locations, including the White House. Immigration groups, human rights activists and some foreign governments and organizations criticized the ban. Both Democratic and Republican lawmakers also spoke out against the order. The order led to confusion at many American airports over the weekend. In some cases, people were detained at airports while holding legal documents allowing them to live and work in the United States.