Mass-Transit Systems Put on Alert Nationwide

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Zazi. Photo: Getty Images

The terror investigation surrounding 24-year-old Colorado resident Najibullah Zazi has now resulted in a nationwide alert to transit agencies. The FBI and Department of Homeland Security sent out warnings that police should be on guard for attacks by hydrogen-peroxide–based explosives. According to the Washington Post, federal officials "called the notice 'precautionary', and said it included possible countermeasures such as random checks of stations, trains and buses." [WP]