Lakhs of school and college students senior citizens and common citizens did yoga exercises to mark the second International Day of Yoga here on Tuesday unmindful of the morning rains. In many parts of the city and suburbs thousands turned up in schools colleges open grounds and other places with their yoga mats and took part in the sessions some of which started at dawn. The Indian Navy completed a three-week long capsule to train 25 personnel and popularise yoga among thousands of its sailors and civilians while over 2000 took part in a yoga programme on Tuesday morning at