India's fight against Covid may be the biggest headline. But in any other scenario, the changing reality of the India-China equation, with the fact that the two sides nearly clashed a year ago and the Line of Actual Control remaining fraught, is without a doubt the biggest national security challenge India has faced since the Kargil war. Why is the relationship between India and China in such a situation? Academician Kanti Bajpai, author of India Versus China: Why They Are Not Friends, a book on the dynamics between the two nations speaks to NDTV about the strained relations between two nations.