Russia's Foreign Ministry has said that "an object similar to an unarmed mortar shell" was confiscated from the baggage of a U.S. Embassy employee at Moscow's Sheremetyevo Airport on March 9, the Russian state news agency TASS reported. The report said the object had a detonator but no explosives. According to the TASS report, the Russian Foreign Ministry considered the incident "a provocation." The incident comes at a time of tense relations between the two countries, aggravated last month by a U.S. decision to withdraw from a key Cold War-era nuclear-arms treaty amid accusations that Moscow had violated it. In...