New Delhi: Chief of Defence Staff (CDS) General Anil Chauhan on Tuesday called for preparedness against bio-threats and radio contamination from nuclear weapons for the future. Reiterating Prime Minister Narendra Modi's call for an undeterred India against nuclear threats, the CDS highlighted the need for training against radiological contamination. He added, "Preparedness against nuclear threats contributes to a deterrence against its use. Gen Chauhan also lauded the efforts of the Military Nursing Service, which contributed to medical treatment under harsh conditions. "Military Nursing Service has completed 100 glorious years of selfless service to the nation.