Watch the complete segment of DNA with Sudhir Chaudhary, May 21, 2018. This segment of DNA brings to you analysis of top news of the day. All you need to know about PM Modi's informal meet with Russia President Vladimir Putin in Sochi. All-women crew of INSV Tarini reach Goa after circumnavigating globe for 254 days . Also, know what happened in history on May 21st over the years. The top news of the day and many more important stories are also covered in this segment.