The first American woman to summit world’s second highest mountain, K2, Vanessa O’Brian called Pakistan a country which showed her support and love.

On her twitter handle, O’ Brian shared a picture holding Pakistani flag on summit of K2 and lauded support she got from Pakistan.

In another tweet she further wrote about ‘forever friendship, peace and tranquility between US and Pakistan’.

According to Forbes, this was O'Brien's third attempt at the "killer" mountain, having been unsuccessful in 2015 and 2016 because of horrific weather. No teams summited in those two years.

This year, weather was a factor again as O'Brien's was the only expedition to reach the top - heavy snowfall and unstable weather sent the bigger teams back, including Russell Brice's revered Himalayan Experience (HIMEX).

At press time, O'Brien and her smallish Day Dreamers team led by Mingma Gyalje Sherpa were making their perilous way down the mountain from Camp 4, perched just above 25,000 feet. It reportedly had taken the group 16 hours from Camp 4 to the top, a very long time, but the weather had held.

In addition to O'Brien, an Explorers Club member, 11 other persons summited. Among the clients were John Snorri Sigurjonsson, the first Icelander to climb K2, and three Chinese climbers - Zhang Liang, Jing Xue and Mr. Azong. The seven Sherpas who topped out were Mingma Gyalje, Dawa Gyalje Sherpa, Tsering Pemba Sherpa, Nima Nuru Sherpa, Lakpa Nuru Sherpa, Nima Tshering Sherpa and Ang Tsering Sherpa.

O'Brien climbed Mt. Everest, the world's highest peak at 29,035 feet, in 2010 en route to becoming the then-fastest woman to climb the Seven Summits - highest mountain on each continent - plus ski the last degree to the North and South Poles, doing all in just 11 months.

"It is said when you climb Everest, you are a mountaineer in the eyes of the world, but when you climb K2 you are a mountaineer in the eyes of other climbers," said O'Brien before her climb. "K2 fascinates me because while it is not quite as high as Everest, it is technically more challenging with exposed rock, steeper terrain and higher avalanche risk."