David Schaper

Wind chill warnings stretch from the Dakotas into Western Pennsylvania. Airlines have canceled thousands of flights, and the governors of Wisconsin, Michigan and Illinois have declared emergencies.

Flight delays were reported at some major East Coast air hubs, because of absent workers at air traffic control facilities, as the government shutdown entered its 35th day.

On Wednesday, unions representing airline pilots, air-traffic controllers and flight attendants said there would be serious safety concerns if the partial government shutdown continues.

From inspecting planes to controlling air traffic, the federal government touches every aspect of air travel. Now a lot of that work isn't getting done because of the government shutdown.

As the shutdown continues, the number of TSA agents calling in sick continues to rise, meaning longer security lines. But some delayed travelers are mixing their frustration with gratitude.

Federal regulations haven't kept up with technology, say drone operators and enthusiasts. Now the Department of Transportation is proposing to allow drones to fly over cities and at night.

Jacinda, whose husband is a TSA officer, says her biggest concern is losing her home. "I feel this sneaking anxiety that it all can be gone," she says.

As the government shutdown continues, there are reports of longer lines at security checkpoints at some airports around the country. TSA acknowledges more employees are calling in sick.

Many online retailers are extending holiday free shipping, but how free is it? It still costs retailers to deliver the goods, there's greater traffic congestion, thefts and a toll on infrastructure.

The explosion in online holiday shopping means billions of packages need to be delivered — and companies like UPS, FedEx and Amazon are under more pressure than ever.

A federal report suggests America's interstates are worn, overused and highly congested. It also recommends billions of dollars in fixes.

Businesses like Amazon and McDonald's are building offices near bus and train lines to attract and keep top talent in a tight labor market.

Indonesian investigators say it appears the pilots of a Lion Air jet that crashed last month struggled with an automated system to control the plane almost from the moment it took off.

A preliminary investigation into the Lion Air crash in October finds the pilots struggled against a new anti-stall flight control system, which forced the plane's nose down 26 times before it crashed.

A report shows that the overwhelming majority of jobs created in the Chicago area are located near transit stations. The same thing is happening in other metropolitan regions — as well as the suburbs.

Airlines predict a record number of people are flying for the holidays. This means millions of people are taking off their shoes, pulling out their laptops and navigating crowded security lines.

Pilots accuse Boeing of downplaying changes to a critical system made in the newest version of the popular 737, which may have played a role in last month's fatal crash in Indonesia.

The American Society of Civil Engineers gives the nation's infrastructure a D-plus grade and says it will take trillions to bring it up to par. But finding the funding is a bipartisan problem.

The Federal Aviation Administration issued the warning after a Boeing 737 crashed in Indonesia last month. It discusses how to handle erroneous data from a sensor that investigators believe malfunctioned.

Cesar Sayoc, a 56-year-old Floridian, has been charged in a case in which suspicious packages were mailed to several prominent Democrats and others.