Filmmaker Vivek Agnihotri has been served a legal notice by the grandson of former Prime Minister Lal Bahadur Shastri ahead of the release of his film The Tashkent Files. Vivek claims that Lal Bahadur Shastri's grandsons have raised an objection about the film and have asked to stop its release. The Tashkent Files revolves around the mysterious death of Lal …