Environmentalists Fear Permanent Damage from US-Mexico Border Wall

President Joe Biden has ordered a pause in the construction of the US-Mexico border wall that was a key part of President Donald Trump’s agenda. As Megan Janetsky reports from the San Bernardino National Wildlife Refuge in southern Arizona, environmentalists say a flurry of construction during Trump’s final days in office created a cascade of environmental problems. VOA Khmer's Vanrith Chrea narrates.