They want to climb Everest in a week using an anesthetic gas. Critics warn it’s dangerous

Four ex-military friends are planning to summit Everest without the usual lengthy acclimitization period, relying on inhalations of noble gas xenon to prepare them, despite warnings this method may be unsafe and unethical.

​ Four ex-military friends are planning to summit Everest without the usual lengthy acclimitization period, relying on inhalations of noble gas xenon to prepare them, despite warnings this method may be unsafe and unethical. Read More Breaking News, Latest News and Videos | CNN