Soldiers take part in the Flaming Thunder 2014 military exercise in Pabrade, Lithuania, on Sept. 10, 2014. More than 300 soldiers from Lithuania and US participated in the two-week military exercise Flaming Thunder 2014 in Lithuania. (Xinhua/Alfredas Pliadis)

Soldiers take part in the Flaming Thunder 2014 military exercise in Pabrade, Lithuania, on Sept. 10, 2014. More than 300 soldiers from Lithuania and US participated in the two-week military exercise Flaming Thunder 2014 in Lithuania. (Xinhua/Alfredas Pliadis)

Soldiers take part in the Flaming Thunder 2014 military exercise in Pabrade, Lithuania, on Sept. 10, 2014. More than 300 soldiers from Lithuania and US participated in the two-week military exercise Flaming Thunder 2014 in Lithuania. (Xinhua/Alfredas Pliadis)

Soldiers take part in the Flaming Thunder 2014 military exercise in Pabrade, Lithuania, on Sept. 10, 2014. More than 300 soldiers from Lithuania and US participated in the two-week military exercise Flaming Thunder 2014 in Lithuania. (Xinhua/Alfredas Pliadis)

Soldiers take part in the Flaming Thunder 2014 military exercise in Pabrade, Lithuania, on Sept. 10, 2014. More than 300 soldiers from Lithuania and US participated in the two-week military exercise Flaming Thunder 2014 in Lithuania. (Xinhua/Alfredas Pliadis)

Soldiers take part in the Flaming Thunder 2014 military exercise in Pabrade, Lithuania, on Sept. 10, 2014. More than 300 soldiers from Lithuania and US participated in the two-week military exercise Flaming Thunder 2014 in Lithuania. (Xinhua/Alfredas Pliadis)