The Associated Press OSLO, Norway (AP) — North Korea may be able to boost Russia's supply of artillery munitions for the war in Ukraine, but that is not likely to make a big difference, the top American military officer said as he arrived in Norway for NATO meetings that began Saturday and will focus in part on the conflict. U.S. Army Gen. Mark Milley, chairman of the Joint Chiefs of Staff, said the recent meeting in Russia between North Korean leader Kim Jong Un and Russian President Vladimir Putin will probably lead North Korea to provide Soviet-era 152 mm artillery…