Prime Minister Narendra Modi marked the 77th Republic Day celebrations by paying homage to the fallen heroes at the National War Memorial in New Delhi on Monday. (Pics/PTI)

The DRDO has successfully conducted a high-speed rocket-sled test of a fighter aircraft escape system at controlled velocity, validating some of the key safety parameters including complete aircrew recovery. Pics/PTI and X/videograbs (@DefenceMinIndia)