Mussoorie, June 12 -- A joint search operation involving the forest department, police and the State Disaster Response Force (SDRF) continued for the second consecutive day on Thursday after a 48-year-old tourist from Haryana went missing in the world heritage site Valley of Flowers in Chamoli district. The missing person has been identified as Gabbar Singh, son of Vikram Singh, a resident of Faridabad. According to officials, he failed to return from his trek on Tuesday, prompting authorities to launch extensive search and rescue operation. Abhimanyu, divisional forest officer (DFO), Nanda Devi National Park, said that joint teams of SDRF, police and forest personnel have been deployed across the valley and adjoining areas to trace the missing trekker. "Search teams have been combing the area continuously. We also deployed two drones on Wednesday to scan difficult and inaccessible stretches of the valley. Despite extensive efforts throughout Wednesday and Thursday, no trace of the missing tourist has been found so far," said Abhimanyu. The DFO said the teams have searched all possible locations where the trekker could have gone and the operation would continue until he is located....