US detains more than 171,000 migrants at the border with Mexico in March | Video | CNN

The US Border Patrol reported the detention of 171,700 migrants at the southern border of the country during March, of which 18,800 were unaccompanied minors.

The White House launched an advertising campaign with a clear message: do not try to cross into the United States because they will continue to return these migrants to their countries of origin.