DEHRADUN: The Joshimath Bachao Sangharsh Samitihas threatened to block traffic on April 27, the day the Badrinath yatra is scheduled to start, if their demands were not met."The situation in Joshimath is the same as it was two months ago. We demand complete scrapping of NTPC's under-construction Tapovan-Vishnugad hydel project and the Helang bypass road," said Atul Sati,group's convenor, on Tuesday.The...