Here's what you may have missed this week on 60 Minutes.Vulnerable U.S. electric grid facing threats from Russia and domestic terroristsWrongful Detainees: Americans unjustly held abroad by foreign governmentsLocal newsrooms strained by budget-slashing financial firmsDanny Fenster on life inside Myanmar's notorious Insein PrisonHow Congress could intervene to aid struggling local news outletsUkraine resistance looks determined as Russian invasion continues for a fourth day