Cyclone Amphan leaves trail of destruction in its wake, Kolkata airport flooded, cars and buses overturned, trees uprooted, thousands of houses damaged; West Bengal CM Mamata Banerjee calls super cyclone a catastrophe, claims damages over Rs 1 lakh crore expected; Airports Authority of India releases guidelines for passengers and airlines to resume flights from May 25th; Meanwhile doctors in China say the virus could be changing as witnessed in a new cluster of outbreak in the country and more news