Associated Press

Washington (AP) - The Homeland Security Department arrested 57 illegal immigrants last month working at airports and other risk-sensitive facilities around the country, underscoring concerns that lax employment background checks are leaving a security breach for terrorists to exploit. In one example, a Peruvian was hired as an airplane mechanic in Greensboro, N.C., using a fake Social Security card he bought for $70 on a soccer field, according to court documents. In another, a Florida power plant was alerted to a Mexican working at its nuclear facility only after being tipped off by labor union employees, company officials said.

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