India must focus on advancements in defence technology to deal with a double threat along the borders, Defence Minister Rajnath Singh said on Thursday, in an oblique reference to the security challenges at the frontiers with China and Pakistan.In an address at a conference organised by the Defence Research and Development Organisation DRDO, Singh underlined the need for extensive research to develop defence technologies for the country to meet various security challenges.For a country like India, it becomes very important because we are facing a double threat on our borders.