Cuban immigrants are bringing their delicious sandwiches and infectious rhythms to the United States in the greatest numbers in over a decade, and they're doing it in a completely new way: through Mexico. While aggressive Coast Guard efforts have reduced the number of Cubans landing on Florida, those who can still reach U.S. soil are able to legally become permanent residents, making the longer route via Mexico preferable. According to one American official,

It's practically Mission Impossible to go directly to Miami.

This "dry foot, wet foot" policy might make it easier for Cuban refugees, but it's making life difficult for U.S. border agents. How are they expected to tell the difference between a Cuban and Mexican? 23/6 explains the subtle differences.