Mystery as huge group of people fall violently-ill while hiking through remote part of Grand Canyon

Dozens of hikers visiting Havasupai Falls at the bottom of the Grand Canyon have reported falling violently ill with a mysterious sickness. In some cases, visitors were too sick to hike back out of the canyon, and needed to be carried out via helicopter. Maylin Griffiths, who visited the falls in Arizona to celebrate her 40th birthday, told AZ Family that her trip quickly turned into a nightmare after she suddenly fell very ill. "We [left] early morning on the 6th and then set up camp. We had a wonderful...