Elliot Spagat
In this Feb. 27, 2019, file photo, a border wall prototype falls during demolition at the border between Tijuana, Mexico, and San Diego. The government is demolishing eight prototypes of Donald Trump's prized border wall that instantly became powerful symbols of his presidency when they were built nine months after he took office. The Biden administration says it will begin work to address flooding and soil erosion risks from unfinished walls on the U.S. border with Mexico. It also began providing answers on how it will use unspent money from shutting down one of President Donald Trump's signature domestic projects. The Defense Department says it will use unobligated money for military construction projects for its initial purpose. (AP Photo/Gregory Bull, File)