Visiting Chief of Staff of the United States Army General Raymond T Odierno says military exercises in the Baltic States will be of ‘greater sizes’ in the future. With joint exercises the US demonstrates NATO’s collective defence commitments at a time when Russia's growing military activity is raising concern. Asked about Russia's military activity, Odierno said, ‘It's concerning that in some ways they are not following the rules that we've set in place with some of their air activity. As part of NATO, it's our responsibility to protect our NATO allies which is why we are here in Lithuania. Major General Almantas Leika, commander of the Lithuanian Land Force, said joint exercises show the US determination to be present here when it's not completely safe in the region, and send clear messages to everyone.’