Mussoorie, May 4 -- The footfall in Kedarnath dham crossed the 30,000-mark on the first day of the opening of the portal of the shrine on Friday, officials said, adding tickets for heli-services for the month of May has been sold out. District tourism officer Rahul Choubey said, "The online slots for May are completely booked, and for the pilgrims planning their yatra in June, the online booking will start from May 7." The helicopter service to Kedarnath is being provided through nine operators from Guptkashi, Sersi and Phata helipad in Rudraprayag district and the online bookings are being done through the official IRCTC portal designated for the heli-yatra. "Pilgrims are cautioned to book helicopter services for June only from the official website and stay away from any other online booking platform," said Rahul Cahoubey....