U.S.' Kerry said concerned by Putin's missile announcement

United States Secretary of State John Kerry (R), with Dr. Dennis Burke (L) at his side, speaks to reporters outside Massachusetts General Hospital in Boston, Massachusetts June 12, 2015. REUTERS/Brian Snyder

WASHINGTON (Reuters) - U.S. Secretary of State John Kerry said on Tuesday he was concerned by Russian President Vladimir Putin's announcement he would add more than 40 new intercontinental ballistic missiles to Russia's nuclear arsenal this year. "It does concern me," Kerry told reporters at a news briefing. Kerry said Putin's stance could be posturing but added, "Nobody should hear that kind of announcement from the leader of a powerful country and not be concerned about what the implications are." (Reporting by Lesley Wroughton and Doina Chiacu; Editing by Bill Trott)