A convoy of tanks and other US military vehicles is driving through eastern European countries that border Russia and Ukraine. The mission aims to reassure a region concerned that the conflict between Russian-backed rebels and government forces in Ukraine could spill over into neighbouring countries.
Dozens of Stryker and other armoured vehicles from the 3rd Squadron of the 2nd Cavalry Regiment, with support from US Air Force Black Hawk and Chinook helicopters, took part in the exercise to show Nato's readiness to defend its members.
The Dragoon Ride convoy started in Estonia and has passed through Latvia, Lithuania and Poland before entering the Czech Republic. The convoy will then head back to its to base in Vilseck, southern Germany.
Poland borders Ukraine and Russia, and the conflict in eastern Ukraine has caused anxiety here. Poland says it has trust in Nato's collective security guarantees but it also harbours bad memories of defence alliances with Britain and France that failed when Nazi Germany invaded in 1939.
The mission plans stops in local communities in each country over the 10-day period.
People gather around a US Army Stryker armoured combat vehicle in Bialystok, north-eastern Poland, on 24 March 2015Marcin Onufryjuk Agencja Gazeta/ReutersA US soldier inspects a Patriot missile defence battery during joint exercises in Sochaczew, near Warsaw, on 21 March 2015Franciszek Mazur/Agencja Gazeta/Reuters
The convoy of US troops driving through eastern Europe was given a warm welcome as it entered the Czech Republic.
In a campaign on Facebook and pro-Russia media, activists had condemned the convoy, pledging to stop it. But opponents were clearly outnumbered by those who came to welcome the troops.
A convoy of US military vehicles arrives in Prague after entering the Czech Republic at the border crossing in Harrachov as part of the Dragoon Ride exerciseMichal Cizek/AFPSupporters greet the US military convoy at the border crossing in Bohumin, central Moravia, Czech RepublicRadek Mica/AFPA US soldier shakes hands with a boy holding an American flag as the US military convoy arrives at the Czech army barracks in PragueMichal Cizek/AFPResidents of Prague welcome US soldiers as the Dragoon Ride convoy arrives in the Czech RepublicDavid W Cerny/ReutersPeople greet a US military convoy as it arrives at the Military School in Vyskov, South MoraviaRadek Mica/AFPA man offers a can of beer to a US Army soldier arriving at Ruzyne barracks in PragueDavid W Cerny/ReutersAnti-US protesters stage a demonstration against the US Army's Dragoon Ride military exercise in PragueDavid W Cerny/ReutersSupporters greet the US military convoy at Ostrava in the Czech RepublicRadek Mica/AFP