Susan Rice joins White House as new National Security Advisor

US President Barack Obama’s confidant Susan Rice, the formerUS Ambassador to the United Nations, has joined the White House as the National Security Advisor. Rice, 48, who replaces Tom Donilon in her new capacity as NSA, would be the top advisor to President Obama on all national security and foreign policies.  ‘Truly honoured to have served the President for the last 4.5 years at the UN & excited to begin as @whitehouse National Security Advisor,’ Rice wrote on Twitter, the micro blogging site, to her nearly 3,00,000 followers.