Fifty years ago, Junko Tabei became the first woman to summit Everest. Why do so few people know her story?

In May 1975, Japanese climber Junko Tabei was part of an-woman team climbing Mount Everest. Despite almost being crushed in an avalanche, she reached the summit by battling on against her injuries.

​ In May 1975, Japanese climber Junko Tabei was part of an-woman team climbing Mount Everest. Despite almost being crushed in an avalanche, she reached the summit by battling on against her injuries. Read More Breaking News, Latest News and Videos | CNN