WATCH: President Donald Trump addresses the nation on Syria (Video and Transcript)

President Donald Trump addressed the nation on the situation in Syria Friday evening.

Trump has decided to bomb the country, according to U.S. administration officials who spoke to Pentagon correspondent Joe Tabet.

“US administration official confirmed to me that a decision to strike #Syria has been taken,” he tweeted.

Watch Trump's full speech below and read the statement:

THE PRESIDENT: My fellow Americans, a short time ago, I ordered the United States Armed Forces to launch precision strikes on targets associated with the chemical weapons capabilities of Syrian dictator Bashar al-Assad. A combined operation with the armed forces of France and the United Kingdom is now underway. We thank them both.

Tonight, I want to speak with you about why we have taken this action.

One year ago, Assad launched a savage chemical weapons attack against his own innocent people. The United States responded with 58 missile strikes that destroyed 20 percent of the Syrian Air Force.

Last Saturday, the Assad regime again deployed chemical weapons to slaughter innocent civilians -- this time, in the town of Douma, near the Syrian capital of Damascus. This massacre was a significant escalation in a pattern of chemical weapons use by that very terrible regime.

The evil and the despicable attack left mothers and fathers, infants and children, thrashing in pain and gasping for air. These are not the actions of a man; they are crimes of a monster instead.

Following the horrors of World War I a century ago, civilized nations joined together to ban chemical warfare. Chemical weapons are uniquely dangerous not only because they inflict gruesome suffering, but because even small amounts can unleash widespread devastation.

The purpose of our actions tonight is to establish a strong deterrent against the production, spread, and use of chemical weapons. Establishing this deterrent is a vital national security interest of the United States. The combined American, British, and French response to these atrocities will integrate all instruments of our national power -- military, economic, and diplomatic. We are prepared to sustain this response until the Syrian regime stops its use of prohibited chemical agents.

I also have a message tonight for the two governments most responsible for supporting, equipping, and financing the criminal Assad regime.

To Iran, and to Russia, I ask: What kind of a nation wants to be associated with the mass murder of innocent men, women, and children?

The nations of the world can be judged by the friends they keep. No nation can succeed in the long run by promoting rogue states, brutal tyrants, and murderous dictators.

In 2013, President Putin and his government promised the world that they would guarantee the elimination of Syria’s chemical weapons. Assad’s recent attack -- and today’s response -- are the direct result of Russia’s failure to keep that promise.

Russia must decide if it will continue down this dark path, or if it will join with civilized nations as a force for stability and peace. Hopefully, someday we’ll get along with Russia, and maybe even Iran -- but maybe not.

I will say this: The United States has a lot to offer, with the greatest and most powerful economy in the history of the world.

In Syria, the United States -- with but a small force being used to eliminate what is left of ISIS -- is doing what is necessary to protect the American people. Over the last year, nearly 100 percent of the territory once controlled by the so-called ISIS caliphate in Syria and Iraq has been liberated and eliminated.

The United States has also rebuilt our friendships across the Middle East. We have asked our partners to take greater responsibility for securing their home region, including contributing large amounts of money for the resources, equipment, and all of the anti-ISIS effort. Increased engagement from our friends, including Saudi Arabia, the United Arab Emirates, Qatar, Egypt, and others can ensure that Iran does not profit from the eradication of ISIS.

America does not seek an indefinite presence in Syria under no circumstances. As other nations step up their contributions, we look forward to the day when we can bring our warriors home. And great warriors they are.

Looking around our very troubled world, Americans have no illusions. We cannot purge the world of evil, or act everywhere there is tyranny.

No amount of American blood or treasure can produce lasting peace and security in the Middle East. It’s a troubled place. We will try to make it better, but it is a troubled place. The United States will be a partner and a friend, but the fate of the region lies in the hands of its own people.

In the last century, we looked straight into the darkest places of the human soul. We saw the anguish that can be unleashed and the evil that can take hold. By the end of the World War I, more than one million people had been killed or injured by chemical weapons. We never want to see that ghastly specter return.

So today, the nations of Britain, France, and the United States of America have marshaled their righteous power against barbarism and brutality.

Tonight, I ask all Americans to say a prayer for our noble warriors and our allies as they carry out their missions.

We pray that God will bring comfort to those suffering in Syria. We pray that God will guide the whole region toward a future of dignity and of peace.

And we pray that God will continue to watch over and bless the United States of America.

Thank you, and goodnight. Thank you.