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Footage of aerial shots of border wall construction from Center for Biological Diversity.

USA TODAY Handout

TUCSON, Ariz. — Border advocacy and conservation groups are eagerly looking to Jan. 20, the date Joe Biden will be sworn in as the 46th president.

They are hoping Biden will reverse numerous immigration and border security policies, chief among them the construction of physical barriers along the U.S.-Mexico border.

Few symbols are more emblematic of President Donald Trump’s administration than the construction of 400 miles of 30-foot bollards along large portions of the southwestern U.S. border, with the expected completion of an additional 50 miles before the end of the year.

U.S. taxpayers, rather than Mexico, as often promised by Trump, are footing the multibillion-dollar bill. Congress has so far allocated $4.4 billion for construction over the past four years, and the Trump administration has awarded an additional $7 billion worth of