Here is a closer look at why the administration says it is instituting full bans on foreign nationals traveling to the U.S. from 12 nations.

A Trump administration travel ban that severely restricts the entry of nationals from Haiti, Cuba, and Venezuela into the United States starts Monday, and it's yet unclear about how the policy will affect operations at Miami International Airport.

The order will bar citizens from 12 countries from traveling to the United States. Visas will be restricted for citizens of seven other countries.