Police in New York and New Jersey are stopping and searching vehicles and following leads in response to a possible terrorist threat to New York City on the tenth anniversary of the September 11, 2001 attacks.

Extra security was also visible in Washington, DC, the other city hit by suicide attackers in hijacked airliners ten years ago.

The police are searching vehicles and detectives are following leads after acquiring credible but uncorroborated evidence that terrorists are planning a car bomb or other form of attack.

The level of investigation shows great contrast between this weekend's response and that of 2001. Hundreds of officials and officers from different agencies are working on this together. A decade ago the same situation would have been handled very differently.

In Grand Rapids, one thing to keep in mind is that if all of this extra security foils a terrorist plot to hit New York or Washington, determined terrorists will still strike somewhere if they can, so it doesn't hurt to stay attentive.

There's lots of information on the situation in New York on the Bloomberg website, and here's a link to a story from Fox News.