National Mourning Day observed: GAZIPUR: Dr. Debasish Sarker, Director General of Bangladesh Agricultural Research Institute (BARI) with other directors of the institute lay wreaths at the portrait of the Bangabandhu Sheikh Mujibur Rahman at the BARI headquarters premises marking the 47th death anniversary of the Father of the Nation Bangabandhu Sheikh Mujibur Rahman and National Mourning Day on Monday.