Congress Vice President Rahul Gandhi today questioned the silence of Prime Minister Narendra Modi on China. In a tweet, Mr Gandhi asked why the Prime Minister was silent on Chinese aggression along the border. <br/><br/>Party spokesperson Randeep Surjewala said China and Chinese ambassador are using provocative language. Saying that India's solemn duty is to protect it's and Bhutan's borders and territory, Mr Surjewala asked what the Centre was doing to address these strategic concerns.