In 2009, new passport laws went into effect that changed the documents required for travel between the US, Mexico and Canada. Called the Western Travel Initiative (WHTI), the regulations required most US citizens to have either a passport or a passport card for land and sea travel to either country, with a passport book being required for air travel.
Local businesses on both sides of the border have been ruing that day ever since, blaming the requirements for slowing down the number of consumers able to casually hop from country to country.
Read Article