The post-Cold War period saw North Atlantic Treaty Organisation (NATO) being expanded not once but twice. In foreseeing the security threats of the 21st century, NATO is seeking to recast its strategic response. The EU and the US are united in their opinion about the need for a stronger and cohesive NATO, and a wider out-of-area role for the alliance. If both the sides start working together and address future challenges, it may bring about a ‘symbiosis’ in the Atlantic Relationship. In a globalised world where interdependency is a norm, it is pertinent for the policy-making and academic communities to take cognisance of the developments within NATO.