IT'S payback time. And Washington is set to submit its IoU for the support it showed India during Kargil. As a first step it announced that Joan Rohlfing—senior advisor for national security to US energy secretary Bill Richardson—will be on a six-month detail at the US embassy in New Delhi, beginning September 1. Her brief: to support ambassador Richard Celeste on non-proliferation issues, a field she has worked in for the last 12 years. For the moment the US seems to have decided that mediation is a dirty word. Right now its priority is non-proliferation issues, especially in getting India to sign the Comprehensive Test Ban Treaty (CTBT).