Winter storm sweeps U.S.

Annie Castro, left, and Sophia Benedetto get ready to sled down a hill at Manassas Battlefield Park in Manassas, Va.

A llama seeks shelter next to an abandoned school bus at Cox Farms in Centreville, Va.

People walk through falling snow at the Capitol in Washington.

Martin Molohon shovels snow off a sidewalk in front of his apartment building in Smithsburg, Md.

Rental cars are covered in snow at Dulles International Airport in Sterling, Va.

There were no lines at security checkpoints at Ronald Reagan National Airport after airlines canceled many flights to Washington, D.C., in Arlington, Va.

Suzanne Seleem from Dayton, Ohio, waits at Ronald Reagan National Airport after her flight home was canceled.

A traveler checks for canceled flights at Ronald Reagan National Airport.

Albert Perez clears a sidewalk at a shopping center in Falls Church, Va.

A family walks home with groceries in Wheaton, Md.

Hunter Gallagher uses a shovel to write his girlfriend's name in the snow on the football field at Catholic University in Washington, D.C.

Brian Hughes and his son Sebastian, 3, play in the snow in Herndon, Va.

A man walks through snow in Silver Spring, Md.

Neighbors play in the snow March 6 in Herndon, Va.

A man clears snow off his car in Silver Spring.

Workers remove snow and slush from the west front of the U.S. Supreme Court in Washington, D.C.

Workers use shovels and brooms to clear the front of the Supreme Court building.

U.S. Capitol Police officer Alex Rys patrols Capitol Hill.

A tourist visits the Capitol as snow and rain falls.

A jogger runs past the White House.

People stand under the Cloud Gate sculpture in Chicago.

Arturo Garcia, left, and Ricardo Perez clear snow from Riverside Plaza in Chicago.

Dave Lape shovels snow off the driveway of his 17th Avenue home in Rockford, Ill.

A pedestrian shields himself with an umbrella as he walks down the street in Chicago.

Indiana Department of Transportation snowplows run side by side clearing snow off the US 35 overpass in LaPorte, Ind.

Commuters cross the Adams Street bridge over the Chicago River in Chicago during a snowstorm.

The sculpture "Cloud Gate", is covered in snow in Chicago.

Mike Davis clears snow from the Millennium Park skating rink in Chicago.

Dave Lofquist helps out his neighbors by snowblowing the sidewalks in southwest Minneapolis.

A pedestrian crosses a downtown street as snow falls in Chicago.

Lindsay Knutson, left, plays in the heavy snow with her family dog, Aspen, and daughter Flora Bejblik, 4, as her husband Bob Bejblik, rear left, shovels, March 5, in southwest Minneapolis. The National Weather Service predicted a two-day snow total of 8 to 12 inches for much of southeastern and east-central Minnesota, including the Twin Cities.

Max Duesing, 7, catches air while sledding in Marion, Iowa. Snow continued to fall Tuesday morning, with 4 to 8 inches of snow forecast for the Cedar Rapids area.

Charlie Regenold, 5, gets a ride to the school bus stop from his dog Rodney as snow fell in southwest Minneapolis. The National Weather Service predicted a two-day snow total of 8 to 12 inches for much of southeastern and east-central Minnesota, including the Twin Cities.

District of Columbia Public Works employee Eddie Sanders III inspects trucks fitted with snowplows in Washington, D.C.

Pedestrians cross Main Street during a snowstorm in Dubuque, Iowa.

Jon Beach climbs over a mound of snow left by a snowplow as he attempts to move his car in Minneapolis.

A snowplow navigates around parked cars as it clears West 3rd Street in Dubuque.

Kevin Anderson walks across a snow-covered ramp as he goes home after work in Dubuque, Iowa.

Mike Flynn tries to free Dora Rojas' car after it got stuck in a rut while turning into an alley in Minneapolis.

Men clear snow in Minneapolis.

A March 5 NASA satellite image shows an enormous winter storm system sweeping across the U.S. from Canada to the Florida Panhandle. "This will be the biggest widespread storm of the winter," says National Weather Service meterorologist Amy Seeley.