2014/12/23 Headlines: NYC Mayor de Blasio Calls for Halt in Protests After Officer Killings; Sister Says Police Shooter Was Suicidal, Needed Help; NYPD Commissioner: Police Animosity Toward Mayor "Part of Politics"; Eric Garner's Daughter Visits Memorial for Slain Officers; Milwaukee Cop Fired over Killing of Mentally Ill Black Man Will Not Face Charges; U.S. Rejects North Korea's "Absurd" Call for Joint Probe of Sony Hack; North Korea Loses Internet Connection; Nicaragua Begins Canal Project That Could Displace Tens of Thousands; Oklahoma to Resume Executions; Arizona to Abandon Drug Used in Botched Killings; Judge Rejects Wage Hike for Home Health Workers; NLRB Says McDonald's Punished Protesting Workers; New York Rep. Michael Grimm to Plead Guilty to Tax Fraud; Newly Freed Member of Cuban 5 Impregnated Wife from Prison with U.S. Help