The current major procurement operation in radar, the SENSR programme, is deemed to entirely renovate the US radar network, from surveillance to air safety and weather radar applications. Capable of meeting the requirements of all four agencies taking part in the project - NORAD, the Department of Homeland Security, the Federal Aviation Administration and the National Oceanic and Atmospheric Administration -, it will use a combination of new technologies and existing systems from across industry. Ahead of the upcoming Military Radar conference, we had the opportunity to interview Brian Lihani, Deputy Chief of the Aerospace Warning Branch at NORAD and speaker at the event, on the factors, goals and timescale of the SENSR programme.