Los Angeles Times
Five California tunnels and two tunnels in Nogales, Ariz., will be filled in over the next two months in an attempt to permanently close off pipelines that smugglers managed to reuse after border authorities discovered them.
Workers poured concrete Tuesday into the largest tunnel under the U.S.-Mexico border, which linked San Diego to Tijuana.
The Department of Homeland Security provided $2.7 million after Sen. Dianne Feinstein, D-Calif., demanded the tunnels be closed, calling them a national security risk.
Los Angeles Times