Bangladesh Nationalist Party (BNP) acting chairman Tarique Rahman returned home to a rousing welcome on Thursday after over 17 years in self-exile, a move that is expected to energise his party workers ahead of the February 12 parliamentary elections. Rahman, the 60-year-old son of ailing former prime minister Khaleda Zia, has emerged as a leading contender for prime ministership in the polls even as the country's Islamist party, Jamaat-e-Islami has been trying to expand its support base. The homecoming of the BNP heir apparent comes amid a fresh wave of unrest and political instability gripping Bangladesh following the killing of prominent youth leader Sharif Osman Hadi, who was a prominent face in last year's mass protests that forced the collapse of the Sheikh Hasina government. Rahman, accompanied by wife Zubaida and daughter Zaima, was received at the Hazrat Shahjalal International airport in Dhaka by BNP Secretary General Mirza Fakhrul Islam Alamgir and other senior party ...