25 Dec Modi s unscheduled trip to Lahore probably was scheduled one. There was a historic unscheduled trip to Beijing by Henry Kissinger, the roving ambassador of Nixon administration. The air force one stopped for fueling in Lahore or rawalpindi and then without declaring the plane took off but headed to Beijing. Deng the successor of Mao was the host. Kissinger was taken away by a limo to dents home. That is what opened up China later. That happened only after nixons visit. All happened in pre mid 70’s..but Modi trip is for political mileage..a bit of history will say that Pak is never and was a reliable friend…may the ire due to loss of east Pak still lingers in the minds..