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Most people like trees — right up until a storm like last Friday's mid-Atlantic "derecho" knocks one into their car. So when is a tree merely nice to look at and when does it become a hazard? Robert Siegel talks to Tchukki Andersen, a staff arborist at the Tree Care Industry Association, about how homeowners can safely care for their trees.

Some pay phones offer free Wi-Fi as part of New York City's experiment to breathe new life into its abandoned public phones. As the city plans to add more wireless-enabled kiosks, companies say advertising may pay for the Wi-Fi — and maybe even for free phone calls.

The South Korean documentary Planet of Snail follows the deaf-blind Young-Chan and his wife, Soon-Ho. Critic Stephanie Zacharek says that rather than only being a movie about Young-Chan's condition, the film is most strikingly a look at the incredible union between he and his wife. (Recommended)

The iPad didn't exist at the last Olympics — the 2010 Winter Games. But when London Summer Games begin Friday, millions of people around the world will watch the action on tablets, mobile phones or other digital gadgets.

Trophy kitchens rule the real estate market, but fewer of us than ever actually cook, or need granite counters and Viking ranges. It's more about the look than the practicality, one realtor admits.

Want to know a secret? London has been a great place to visit during the Olympics. The city hasn't come to a grinding halt. The weather has not been awful; the sun has even been shining. And London has put out the welcome mat to visitors.

Adam Steltzner, the leader of the Mars rover's entry, descent and landing engineering team, says he was terrified of "a false positive celebration" in the control room. Fortunately for him, Curiosity landed perfectly. Now he's eyeing Jupiter's moon.

Jamaican Usain Bolt cemented his place as one of the greatest sprinters in history, when he won the 200 meter final Thursday. Bolt is the first Olympian to win both the 100 meter and 200 meter races two Olympics in a row.

After the death of cyclist, the British star made the case for helmet laws. For that, he's been denounced in the U.K. by those who say such a law would make cycling less popular.

A big counterattack is brewing in Syria's most important city after Damascus. Rebel fighters had taken control of parts of Aleppo but say heavy reinforcements for the Syrian army are now arriving. Activists also say that in Damascus, loyalist forces have been exacting a bloody revenge. Even as Syrians — from soldiers to diplomats — are turning against the regime, the power on the ground remains with the military.