Duke and Duchess of Cambridge Prince William and Kate Middleton today laid a wreath at the Amar Jawan Jyoti at India Gate. They paid tributes to the seventy thousand Indian soldiers who fought and died for the British during first World War.<br/><br/>Duchess and Duke also visited Gandhi Smriti in Old Birla House and paid their tributes to Mahatma Gandhi. Today, they will also attend a birthday party for the Queen, who turns 90 on 21st April, at the residence of the British High Commissioner. <br/><br/>Prime Minister Narendra Modi will host lunch for them tomorrow. The duo arrived in New Delhi today from Mumbai as part of their week long tour of India and Bhutan.