NATO advance force battalion group (EFP) demonstrates a water obstacle crossing during an International exercise "Iron Wolf 2017 /Saber Strike 2017' in Stasenai on June 20, 2017. The multinational Exercise Iron Wolf 2017 as part of the Exercise Saber Strike 2017 is running in Lithuania on June 12-23 and involves over 5 thousand troops from 10 NATO allies. / AFP PHOTO / Petras Malukas (Photo credit should read PETRAS MALUKAS/AFP via Getty Images)
