Amid clouds of dust, border wall prototypes are demolished

SAN DIEGO (AP) — 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 Trump administration says elements of the prototypes have been melded into current border fence designs and they have served their purpose.
The four concrete and four steel panels, spaced closely together steps from an existing barrier separating San Diego and Tijuana, Mexico,