This Sept. 5, 2014 photo shows several amanita muscaria or "fly agaric" mushrooms on the forest floor of the Black Forest near Enzklosterle, Germany. The Black Forest got its name from a canopy of leaves so dense that parts of the woods are dark. It also inspired Grimm Brothers' fairy tales. (AP Photo/Siobhan Starrs)

Mushrooms of all shapes, sizes and shades emerge from rotting tree stumps and leaves in vivid crimsons, delicate corals, black, brown, purple and orange. You mustn’t try them without expert guidance though; like potions in a Grimm Brothers story, they might be poison.

“Given Mr. Roberts’ claims regarding manipulating aircraft systems, we’ve decided it’s in the best interest of our customers and crew members that he not be allowed to fly United,” airline spokesman Rahsaan Johnson told The Associated Press.

FILE - In this Wednesday, March 18, 2015, file photo, the Uber app displays cars available to make a pickup in downtown Manhattan on a smart phone, in New York. A new report by expense management system provider Certify shows that 47 percent of the ground transportation rides by its users in March were through Uber. (AP Photo/Mary Altaffer, File)

“While we often see noteworthy market shifts — leading restaurant chains and hotels exchanging leadership positions, for example — it is unprecedented to see one vendor grow to take such a commanding market share within one year’s time,” says Certify CEO Bob Neveu.

Home owner Israel Ribero looks from his home with rooms for rent in Havana, Cuba, Wednesday, April 1, 2015. The wildly popular online home-sharing service Airbnb will allow American travelers to book lodging in Cuba starting Thursday in the most significant U.S. business expansion on the island since the declaration of detente between the two countries late last year. (AP Photo/Desmond Boylan)

“We believe that Cuba could become one of Airbnb’s biggest markets in Latin America,” said Kay Kuehne, regional director for Airbnb, the website and mobile app that allows users to book rooms in more than 1 million private homes around the world. “We are actually plugging into an existing culture of micro-enterprise in Cuba. The hosts in Cuba have been doing for decades what we just started doing seven years ago.”

In this Tuesday, March 24, 2015 photo, Jordanian royal desert forces stand guard in front of Al Khazneh, Arabic for the Treasury, the most dramatic of many facades carved into the mountains, in the ancient city of Petra, Jordan. It's high season in Petra, the ancient city hewn from rose-colored rock and Jordan's biggest tourist draw. Yet nearby hotels stand virtually empty these days and only a trickle of tourists make their way through a landmark canyon to the Treasury building where scenes of one of the "Indiana Jones" movies were filmed. (AP Photo/Raad Adayleh)

“We are not optimistic for 2015,” said Ahmad Amarat, manager of the 95-room Kings’ Way Hotel near Petra, which closed four months ago after an average occupancy rate of 28 percent for 2014, compared to 95 percent in 2010.

In this Jan. 22, 2015 photo, Gentoo penguins gather near a post of wooden arrows with names of cities and their respective distances, at the Bernardo O'Higgins scientific station, Antarctica. Increasing foot traffic poses “particular risks of disturbance or contamination to some of the last remaining essentially pristine areas on the planet,” said Alan Hemmings, an environmental consultant on polar regions. “We should not passively watch Antarctica being turned into a theme park.” (AP Photo/Natacha Pisarenko)

“Was it worth it? Yes, of course it was,” said Christine Brannan of England, who along with dozens of other tourists spent a few days stranded on a cruise ship waiting for thick fog to clear so they could go home. “But I would say to anybody who wants to do the flight and cruise to be aware of the unpredictability.”

FILE - In this Jan. 23, 2015, file photo, tourists use a 'selfie stick' in London. A French palace and a British museum have joined the growing list of global tourist attractions that have banned “selfie sticks” _ devices visitors use to improve snapshots, but which critics say are obnoxious and potentially dangerous. (AP Photo/PA, John Stillwell) UNITED KINGDOM OUT NO SALES NO ARCHIVE

The devices are used to improve snapshots, but critics say they are obnoxious and potentially dangerous. Officials at Palace of Versailles outside Paris, and Britain’s National Gallery in London, announced the bans Wednesday, saying they need to protect artworks and other visitors.