KOLKATA: Arijit Dey, a Kolkata based civil engineer, has achieved a rare feat after he made it to the summit of Mount Manaslu (8,163 meter) -- the eighth highest mountain in the world without a Sherpa on Sunday evening. On Tuesday, Dey claimed that he made it to the summit without supplemental oxygen. Dey is also the first climber from Bengal to have made it to the “true summit” of Mount Manaslu...