NATO Secretary General Jens Stoltenberg says the military alliance is concerned about the financial turmoil in Greece, which is a member of the 28-nation group.Stoltenberg called Greece "a staunch ally and a committed ally" on Thursday. He said the Greek government stands by its "commitments in the alliance. This good for Greece and good for NATO."Speaking at a press conference in Bucharest, the Romanian capital, Stoltenberg said NATO was following European Union efforts "very closely" and that a solution to Greece's economic problems would be good for Greece, the EU and NATO.One of the issues that divided Greece and its creditors before talks broke off last week was defense spending. The Greek government had offered to cut 200 million euros ($222 million) annually from its defense budget but lenders demanded twice that amount.