A Terrorist's Ticket to the U.S.?

Security officials say illicit tunnels and fake visas threaten U.S. borders.

Illicit Tunnels & Forged Visas: A Terrorist's Ticket to the U.S.?

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Drug cartels and traffickers are often aided by corrupt Mexican law enforcement officials; some are even on the cartels' payrolls.

On Sept. 26, 2006, four Mexican customs inspectors and one customs supervisor were arrested while digging a tunnel in Tijuana toward the U.S. border.

The tunnel pictured to the left, which ended in San Ysidro, Calif., was also dug by Mexican customs officials. (Unclassified Government Photo)

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