US President Barack Obama on Tuesday said the country is "ready to lead" the world once again.
The 44th President of the US promised, with all like-minded countries, to resolve the issues facing the world. America under him is not going to dissuaded by terrorism or those who believe in it, he said.
In a message sent to people all over the world, Obama said: "To all other peoples and governments who are watching today, from the grandest capitals to the small village where my father was born: know that America is a friend of each nation and every man, woman, and child who seeks a future of peace and dignity, and that we are ready to lead once more."
In his speech at the inauguration function, Obama recalled that earlier generations faced down fascism and communism not just with missiles and tanks, but with sturdy alliances and enduring convictions.
"They understood that our power alone cannot protect us, nor does it entitle us to do as we please," he said.
"Instead, they knew that our power grows through its prudent use; our security emanates from the justness of our cause, the force of our example, the tempering qualities of humility and restraint," Obama said.
"We are the keepers of this legacy," Obama asserted, sending his strong message to the world.
It is guided by these principles once more; Obama said the US can meet those new threats that demand even greater effort - even greater cooperation and understanding between nations.
"We will begin to responsibly leave Iraq to its people, and forge a hard-earned peace in Afghanistan," Obama said, articulating his foreign policy with regard to Afghanistan and Iraq.
Obama has promised to withdraw US troops from Iraq within 16 months and indicated that he wants to focus his entire attention on Afghanistan.
"With old friends and former foes, we will work tirelessly to lessen the nuclear threat, and roll back the specter of a warming planet," Obama said, indicating that non-proliferation and climate change would be another issues on his table of foreign policy.
"We will not apologize for our way of life, nor will we waver in its defense, and for those who seek to advance their aims by inducing terror and slaughtering innocents, we say to you now that our spirit is stronger and cannot be broken; you cannot outlast us, and we will defeat you," Obama said at the historic function attended by millions of his supporters in Washington.