Russian Military Planes Crowd the U.S. for a Fourth Day

Russia flew long-range combat aircraft near American airspace for the fourth consecutive day, the Pentagon said Friday, marking the first such string of incursions since 2014,

.. U.S. military officials declined to speculate about Russia’s motives for the flights, which came amid an increase in tension between the two countries following U.S. cruise missile strikes earlier this month targeting Syria’s military aircraft.