Former President Donald Trump promised his supporters an impenetrable border wall between the United States and Mexico. Instead, the $15 billion wall was reportedly breached thousands of times in areas where it was completed, and the smugglers who cut through it were able to do so with cheap power tools available in retail stores.

Unpublished data from U.S. Customs and Border Protection obtained via the Freedom of Information Act showed that Mexican smugglers cut through the wall 3,272 times over three years, according to The Washington Post. In some cases, they replaced the areas they cut with tinted putty, essentially creating secret passages.

You have to look really closely to see it, one source told the newspaper.