This April 10, 2016 photo shows yellow and orange tents at Everest Base Camp, pitched on the edges of the Khumbu icefall in Nepal. A trek to Everest Base Camp along mountain paths hugging it's deep gorges offers renewal and a test of mental and physical limits. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 7, 2016 photo shows a Palestinian banner and an Israeli flag displayed on the wall of a dining hall in a lodge in Tengboche, Nepal. Many trekkers hang flags in tea houses to mark their journey and express national pride. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 9, 2016 photo shows a solar power water heater in the foreground and a Nepali woman in the background, pouring water into a large kettle in the village of Dughla, Nepal. A trek to Everest Base Camp along mountain paths hugging it's deep gorges offers renewal and a test of mental and physical limits. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 5, 2016 photo shows the village of Namche Bazaar, one of the main communities in the Khumbu region surrounding Everest in Nepal. Trekkers often spend an extra day in Namche Bazaar, at an altitude of 3,440 meters ((11,287 feet), to acclimatize and stock up on supplies. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 10, 2016 photo shows trekkers heading to Everest Base Camp, Nepal. The cone-shaped Pumo Ri peak (23,495 feet (7,161 meters) is seen in the background. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 6, 2016 photo shows a Nepali porter carrying his load north of the village of Namche Bazaar, Nepal. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 6, 2016 photo shows trekkers at a rest stop north of the village of Namche Bazaar, Nepal. April falls into the peak season for trekking and the trail is often crowded. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 7, 2016 photo shows the Buddhisdt monastery gate at the entrance to the small mountain village of Tengboche, elevation 12,664 feet (3,860 meters), at sunrise. Trekkers can attend daily Buddhist chanting ceremonies in the monastery, though taking photos and videos inside the shrine is strictly prohibited. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 5, 2016 photo shows a Nepali builder at a construction site at a mountain viewing point on the outskirts of Namche Bazaar, Nepal. A trek to Everest Base Camp along mountain paths hugging it's deep gorges offers renewal and a test of mental and physical limits. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)This April 9, 2016 photo shows a memorial stupa for U.S. mountain climber and guide Scott Fischer, on the outskirts of the village of Dughla, on the path to Everest Base Camp, Nepal. Fischer was among eight climbers who got killed during an Everest summit attempt when they were caught in a blizzard on May 10-11, 1996. A trek to Everest Base Camp along mountain paths that hug deep gorges offers renewal and a test of mental and physical limits. Along the way there are sore knees and altitude sickness, but the spectacular landscapes, friendly villagers and moments of tranquility make the journey an unforgettable experience. (AP Photo/Karin Laub)Karin Laub (AP)
