RICHMOND, VA (WWBT) - Federal authorities continue to investigate an "unconfirmed threat" that suggested Al Qaeda terrorists may be planning an attack in Washington or New York.
Officials say the threat comes from Pakistan - three men possibly sent to the US some possibly with U.S. passports.
"We are doing everything within our power. All hands are on deck," said Vice President Joe Biden.
Throughout the District of Columbia, almost 400 additional officers and bomb sniffing dogs have been put on the streets and metro terminals- as reports of suspicious activity linked to the anniversary are up almost 30%.
In New York, cops are on high alert. Police search trucks in the midtown tunnel and security check points can be seen around the city.
The public warning is part of the defense plan.
"To enlist the millions and millions of New Yorkers and Americans to be the eyes and ears of vigilance," said Secretary of State, Hillary Clinton.
Airports in New York and D.C. are being extra careful - checking bags and travelers through TSA. But the message to go about your daily life is clear.
"There is always a threat there is not any reason why we should hunker down," said New York City Mayor, Michael Bloomberg.
It's how travelers here at RIC feel about this weekend.
"I noticed it obviously. But you've got to do what you got to do. You can't plan around it. You've just got to live your life," said traveler, Jamie Wallmeyer.
And as the anniversary of 9-11 falls every year on Nascar day, RIR is also on high alert as police patrols are beefed up and spread out among the thousands of Nascar fans.
"Not worried at all, having a very good time. I feel very safe all the police and fire personnel around here. I think we're in good hands," said Steve Patterson.