Prime Minister Narendra Modi on Friday said that only Atal Bihari Vajpayee ji's formula can work for Jammu and Kashmir. Talking about Jammu and Kashmir, in an exclusive interview with Aaj Tak in Varanasi, Prime Minister vowed to follow Vajpayee's doctrine of "Insaniyat, Jamhuriyat and Kashmiriyat" but with a caveat -- not to let the state be "emotionally blackmailed by …