There are few people in history that have done more for the agenda of freedom in the world then President @BillClinton. I bestowed him today Presidential Medal of Freedom as a token of appreciation from #Kosovo for the liberty he brought to us and the peace to entire region. pic.twitter.com/gpvBy23ZG9
Mr Clinton, Madeleine Albright - who is the former US Secretary of State - and other international politicians are in Kosovo to attend a ceremony marking 20 years since NATO troops were deployed there.
They helped stop a bloody Serb crackdown on ethnic Albanian nationalists in Kosovo, then a province of Serbia.
A 78-day NATO bombing campaign ended the 1998-99 conflict, which saw more than 10,000 people killed.
Mr Clinton and Ms Albright were instrumental in getting the NATO campaign approved, and both oversaw the Kosovo-Serbia peace deal after the war.
On 12 June 1999, NATO troops started to make their way into Kosovo.
Before first light, British paratroopers from 5th Airborne Brigade and personnel from the Gurkha Rifles had started crossing over the border from Macedonia.
British Chinook and US Apache helicopters followed, while on the ground soldiers from 4 Armoured Brigade lined up in convoy.