Prime Minister Muhammad Shehbaz Sharif has paid glowing tribute to former Prime Minister Shaheed Zulfikar Ali Bhutto on his 45th death anniversary being observed today.In a message, the Prime Minister said Zulfikar Ali Bhutto played a key role in promoting democracy and democratic traditions in Pakistan.He said it was due to efforts of Zulfikar Ali Bhutto that the country adopted a unanimously agreed upon Constitution in 1973.The Prime Minister said a recent judgment of the Supreme Court has endorsed Bhutto's political struggle.Shehbaz Sharif said Zulfikar Ali Bhutto's services for democracy in Pakistan will always be remembered.Source: Radio Pakistan