If you already think airport security is a hassle, you better buckle up if you spot "SSSS" printed on your boarding pass. The dreaded designation stands for Secondary Security Screening Selection, and it means your airport security experience is about to get a lot more intense. When you're tagged for SSSS, you'll have to undergo an extra security screening, and it can add anywhere from a few minutes to half an hour — or more — to the whole security process. Here's everything you need to know about SSSS.

Nearly a century ago, writer Aldous Huxley called Los Angeles “19 suburbs in search of a metropolis.” In many ways, Las Vegas is the 20th suburb. The two cities share such links as the Old Spanish Trail, the L.A. to Salt Lake Railroad and Interstate 15. Three Southern California architects also did a great deal to make Las Vegas look the way it has and does.

Crimes will be significantly fewer if you attack the criminal logistics. This is the opinion of the American criminologist Tamara Herold, who is on a temporary visit to Stockholm.

Sociologist Marta Soligo examines the link between cinema and tourism, applied to the case of Las Vegas, a city that 'lives' on casinos but which over the decades has also become a destination for lovers of sports and cultural events.

A recent report from the Centers for Disease Control and Prevention reveals that birth rates in the United States have dropped significantly. And as Adriana Arévalo explains to us, analysts warn about the economic consequences.

Turning your phone on "airplane mode" once your plane is preparing for takeoff is a standard part of any frequent flier's onboard routine. In airplane mode, your phone is disconnected from cellular networks, but you can still use the device — and even connect it to in-flight Wi-Fi if it's available.

There are simple ways to increase intensity without turning your stroll into a slog.

Have $10,000 to invest? Here are 14 smart investments ideas to turn $10k into even bigger money.