article_snippet.sent: The Transportation Security Administration alerted local law enforcement agencies that are responsible for external security around airports, but officials said the possible threat is not necessarily aviation-related.
article_snippet.sent: Some cities around the United States have increased Some cities around the United States security as a precaution.
article_snippet.sent: A Department of Homeland Security spokesperson declined Saturday to talk about specifics, but spoke about security measures in general.
article_snippet.sent: Over the last few months, we have made a number of security adjustments, including enhanced screening at select overseas airports and increasing random searches of passengers and carry-on luggage on flights inbound to U.S., reflecting an evolving threat picture," A Department of Homeland Security spokesperson said.
article_snippet.sent: A Department of Homeland Security spokesperson said The Transportation Security Administration added layers of security to the Electronic System for Travel Authorization.
article_snippet.sent: ETSA is an online application system to screen travelers before travelers are allow to board an airplane or ship bound for the United States.
article_snippet.sent: In February, a more visible law enforcement presence was put in place at federal facilities, A Department of Homeland Security spokesperson said.
article_snippet.sent: A Department of Homeland Security has conducted significant outreach efforts ... with state and local law enforcement partners regarding these trends and engaging in a series of meetings and events with local community leaders across the country to counter violent extremism," A Department of Homeland Security spokesperson said.