President Abdul Hamid and Prime Minister Sheikh Hasina have paid rich tributes to the martyrs of Liberation War by placing wreath at the National Memorial, marking the 46th Victory Day.The President and Prime Minister placed wreaths at the National Memorial at 6.34am on Friday.After placing wreaths, the president and the prime minister stood in solemn silence for a minute as a mark of respect to the memories of the martyrs.A smartly turned out contingent from Bangladesh Army, Bangladesh Navy and Bangladesh Air Force presented state salute on the occasion when bugles played the last post.