Amid a chill in bilateral relations, waving at each other was all that Prime Minister Narendra Modi and his Pakistani counterpart Nawaz Sharif did today as they attended the UN peacekeeping summit. Assembling for the Leaders' Summit on Peacekeeping being hosted by US President Barack Obama, PM Modi walked into the conference hall first. PM Sharif followed a few minutes later and waved at PM Modi. The Indian Prime Minister waved back and smiled.