ISLAMABAD - Prime Minister Syed Yousuf Raza Gilani has said operation in Lower Dir and Buner was meant to re-establish the writ of the Constitution and for restoring Quaid-e-Azams Pakistan. Talking to Minister for Interior Rahman Malik at the PM House on Thursday, the Prime Minister said at this crucial time entire nation should forget political differences and rise to the occasion with unity to meet the challenges. This is the only way that designs of the militants and extremists can be defeated, he added. The Interior Minister briefed the Prime Minister about the overall law and order situation in the country and apprised him of the situation in Karachi after recent incidents of violence. He informed him of the steps being taken by the law enforcement agencies for maintaining law and order in the city. The Prime Minister also reviewed the earlier instructions given to the Interior Ministry regarding the early rehabilitation of Internally Displaced Persons.