In 2 days, the US Secretary of State Mike Pompeo and the US Secretary Defence James Mattis arrive in India for a critical round of talks which could redefine the Indo-US strategic equation. There is a sense that both sides will sign a key agreement that allows the armed forces to share military information on a real-time basis. But India has concerns that the US may be able to monitor the movement of Indian drones and reconnaissance aircraft. Vishnu Som has the details.