Israel's prime minister, Benjamin Netanyahu, entered Syrian territory Tuesday and said Israeli troops would remain in the area indefinitely, blurring the border with its northern neighbour. Since its establishment in 1948, Israel has never had fully recognized borders. Throughout its history, the frontiers with its Arab neighbours have shifted as a result of wars, annexations, ceasefires and peace agreements. Now, the downfall of Syrian President Bashar Assad has created a situation that could once again reshape Israel's borders. As Assad was toppled early this month, Israel quickly moved into the Syrian side of a 50-year-old demilitarized buffer zone. Netanyahu described the move as defensive and temporary, and said it was aimed at making sure that none of the groups jostling for power inside Syria threatened Israel. But in Tuesday's visit to the Syrian side of the buffer zone, Netanyahu made clear that Israel plans on staying for some time. Speaking on the windswept summit of Mou