Inside Europe: Largescale war games on NATO's eastern flank

The largest NATO manoeuvres in central and eastern Europe since the end of the Cold War are underway in Poland. Coming ahead of the organisation’s summit in Warsaw next month, they're meant to demonstrate NATO’s resolve in dealing with mounting tension caused by the Moscow’s so-called hybrid war in Ukraine. As Julian Berner reports from Warsaw, Russia has reacted angrily to the manoeuvres.