Ajmer, Feb 28: A special Tada court today sentenced to life imprisonment 15 persons charged with trigerring blasts in five trains on the first anniversary of the 1992 Babri mosque demolition at Ayodhya. Five people were killed and many others injured in the blasts on December five and six, 1993, in the Mumbai-Delhi Rajdhani Express, the flying queen express, frontier mail and two other trains at Kota, Lucknow, Mumbai, Hyderabad and Gulbarga. Bureau Report