BEIJING (Reuters) - Indian Foreign Secretary Subrahmanyam Jaishankar said Indian and Chinese troops must maintain cooperation to ensure that a recent confrontation on their common border did not happen again. Speaking to reporters on the sidelines of a BRICS summit in the southeastern Chinese city of Xiamen, Jaishankar said peace in border areas was a prerequisite for India-China development and the two countries had agreed to make more efforts to enhance mutual trust. 