Many taking extra precautions in wake of terror threats

Police cars, K-9 units and a new normal fill city streets as new threats name Washington D.C. as a potential terrorist target.

"In the mornings, I've seen increased security on the Metro," said Claire Turck. "I feel safer. I just go about my day-to-day life and I'm appreciative that there is increased security."

"There seems to be police across the street, increased police security," said Turck's sister, Kaitlin.

Kaitlin and Claire Turck live in Alexandria, but work in D.C.

"I think everyone is more careful by taking a look around and they always have the announcements on the Metro, like 'If you see something, say something,' but I think people in D.C. are pretty reasonable and aren't getting too scared to quickly," said Kaitlin.

Even so, in Beltsville, Maryland, police, firefighters and a bomb squad swarmed a neighborhood after an abandoned suitcase was discovered in a trash bin.

Back in D.C., the Smithsonian said two schools canceled scheduled field trips on the heels of the terror attacks.

D.C. Mayor Muriel Bowser said don't feed into the fear.

"I just left Truesdell School where the first graders are getting on a Metro bus to go to the National Zoo," said Bowser. "I don't think anybody, in any school district anywhere in the United States shouldn't follow the lead of the Truesdell students."

Green Middle School in Ohio postponed its eighth grade field trip to the nation's capital and Gettysburg reportedly amid concerns about terrorist attacks.

D.C. city leaders remind everyone - if you see something, say something.