Islamabad Capital Territory of Rawalpindi District, which is part of province of Punjab. Initially, it was proposed that the three areas would be connected by four major highways: Murree Highway, Islamabad Highway, Soan Highway, and Capital Highway. However, to date only two highways have been constructed: Kashmir Highway (the former Murree Highway) and Islamabad Highway. Plans of constructing Margalla Avenue are also underway. Islamabad is the hub all the governmental activities while Rawalpindi is the centre of all industrial, commercial, and military activities. The two cities are considered sister cities and are highly interdependent. Islamabad is a net contributor to the Pakistani economy,
Islamabad Marriott Hotel bombing parliament. The Marriott was the most prestigious hotel in the capital, and was located near government buildings, diplomatic missions, embassies and high commissions. During the investigation, three suspected terrorists were arrested by the Pakistani police. They were suspected of having facilitated the suicide bomber. However later they were acquitted of all charges as no evidence was ever presented against them. A few months after the hotel's bombing the Government of Pakistan had re-constructed it, and the Islamabad Marriott reopened officially on 28 December 2008. The hotel blast caused a severe natural gas leak that set the top floor of the