NEW DELHI: Delhi Metro has increased the operational speed of Metro trains on the Airport Express Line to 120 kmph starting Sunday, officials said. The total journey from New Delhi station to newly-built Yashobhoomi Dwarka Sector 25 station will take about 21 minutes, they said. "Prime Minister Narendra Moditook a metro ride to reach the new station at Dwarka Sector-25.The train he travelled in moved at...