A man in a snowmobile looks at an Air Force helicopter as it lands in Antarctica September 19, 2005. Chilean and Argentine rescue patrols are searching for a Navy officer and a scientist who fell into an ice crevasse, believed to be at least 50 m deep, while travelling by snowmobile near the Collins glacier, some 12 km (7.5 miles) from the Jubany base in the Antarctic Peninsula September 18, 2005. No contact has been made with them since and hopes are fading they would be found alive in the sub-zero temperatures of the Antarctic Peninsula. Picture taken September 19, 2005. REUTERS/Chilean Air Force/Handout IA/CN