New Delhi, Feb. 13 -- The National Investigation Agency (NIA) on Wednesday filed a supplementary charge sheet against four Jaish-e-Mohammed (JeM) operatives including Sajjad Ahmad Khan, who was in direct touch with last year's Pulwama attack mastermind, Mudassir Khan. The other three charged in a case of hatching criminal conspiracy to carry out terror attacks across the country include Bilal Ahmad Mir, Ishfaq Ahmad Bhat and Mehraj-ud-Din Chopan. "Mudassir was one of the main conspirators in Pulwama terror attack as well and was killed in encounter with security forces Pulwama's Tral area in March last year.p4...