A Saudi business delegation is due in Pakistan this week to kick off what Islamabad hopes is a program of investment following a mutual defence agreement, though major investments may be dependent on reforms, officials and experts said. Pakistani sources anticipate initial investment plans of about $1 billion, possibly through the creation of a new fund, as a path to a deeper economic relationship mirroring military ties. Under last month's defence deal Pakistani forces are expected to be stationed in Saudi Arabia, with Riyadh indicating it will also come under the protection of Islamabad’s nuclear weapons. Gulf Arab states say Israel is a direct threat, after its unprecedented strikes on Qatar in September. Less clear is what Pakistan gets out...