Diplomacy can be demanding at times not merely due to the hard-nosed bargaining that’s involved but also because of the sheer logistics of travel. Take the Indian Prime Ministerial delegation headed for the two-day G-20 Summit in Buenos Aires beginning November 30. The delegation will be logging in nearly as many hours in air as it will on land while in Buenos Aires. It’s a long haul flight to the other side of the planet. From New Delhi, it will first fly 11 hours to South Africa and after a halt of two hours will be airborne again for another 11 hours heading for the Argentinian capital. Two packed days in Buenos Aires attending the Summit and having meetings with world leaders on its margins and the PM and his delegation will head back to New Delhi taking the same route. What about jet lag? Perhaps scientists studying the after-effects of long haul flights may have the answer. But we do know that National Security Adviser Ajit Doval who was to be part of the delegation is now staying back in New Delhi.