New Delhi, Feb. 21 -- : The trailer of Akshay Kumar-starrer 'Kesari' is finally out and it takes the audience on the journey of a heroic story of nation's unsung warriors.Akshay took to his Twitter handle to share the trailer of the upcoming movie. He wrote, "An incredible true story of valour, sacrifice & bravery - told like never before! #KesariTrailer out now."The trailer begins with Akshay saying, "A Britisher, once told me, I am a slave and only cowards are born in India. Today is the day to give him a reply." Just a few seconds later, the viewers can seen Afghan soldiers, in huge numbers, running towards Akshay's character Havildar Ishar Singh, the leader of the Sikh regiment. The trailer then takes the audience in the world of the br...