After 'Macbeth,' the risky occupation of Scotland in topical sequel 'Dunsinane'

Macbeth is dead. What's next? In David Greig's imaginative and ferociously topical "Dunsinane," the English army occupies a hostile and internally fragmented Scotland. Faster than you can say "quagmire," you recognize the saga in terms of our knotty 21st-century conflicts in Afghanistan and Iraq.