President Obama said at the White House there is no particular and reliable intelligence demonstrating a plot against the U.S. while guaranteeing worried Americans, while the danger of terrorism is an alarming reality of our age, they are both prepared to anticipate attacks.

Homeland Security Secretary Jeh Johnson echoed Obama's announcement that there are no particular, credible threats to the country ahead of the 2015 Christmas season. Johnson's comments came at a press conference Wednesday afternoon at Washington DC's Union Station where he blocked an Amtrak Acela train to Newark, N.J. to head home toward the Thanksgiving holiday.

Johnson told columnists that DHS and its state and local partners are communicating continued vigilance in securing the country and keep on working extra time and effort to monitor possible threats.

When asked how much integrity he puts in the no particular, danger assessment given apprehensions including encoded communications and the going dark phenomenon, Johnson noticed that law enforcement authorities are strengthening efforts to establish safety around the area and recognised concerns surrounding lone actors.

Almost 47 million Americans are anticipated to take a car, plane, bus or train no less than 50 miles from home over the long weekend, based on AAA. That is the most travelers since 2007, a rise attributed to an enhancing and improving economy and the least expensive fuel for this season of year since 2008.

Motorists experienced snowfall in California's Sierra Nevada and rain in the San Francisco Bay Area, while drivers in Montana and Wyoming were cautioned of frigid streets after wintry storms moved through. Voyagers taking off on Thanksgiving Day could see 8 inches of snow in the Denver area.

Anyone heading to a major airplane terminal should factor in 50 extra minutes on the road, based on the traffic data organisation INRIX, in addition to time spent experiencing security.