India's Arjun Vajpai has become the youngest person in the world to climb six of the 14 peaks that are over 8,000 metres after successfully scaling Mount Kanchenjunga. The 24-year-old Noida-based mountaineer had earlier climbed Mount Everest, Lhotse and Manaslu. Nepal's Chhang Dawa Sherpa presently holds the record for being the youngest to climb all 14 peaks aged 30.