Itanagar, July 4 (IANS) An Indian Air Force (IAF) helicopter with three operating crews on board went missing in Arunachal Pradesh’s Papum Pare district on Tuesday, officials said. Earlier on. Affected landowners and farmer representatives have demanded clear written assurances on market valuation and fair compensation norms before field surveys or land acquisition proceed. District officials are expected to hold consultations with local stakeholders to resolve the impasse.