Today's Headlines -- Sunday

• Christmas attacks in Nigeria by sect kill 39 (AP)
• Decades later, a Cold War secret is revealed (AP)
• Wives in ads, kids on the bus as GOP voting nears (AP)
• NKorea pointing to heir's uncle playing key role (AP)
• Sudan army kills leader of main Darfur rebel group (AP)
• Some NFL players still willing to hide concussions (AP)
• Iranian woman to face death by stoning or hanging (AP)
• Hackers target US security think tank (AP)
• Tough choice looms on 9/11 health lawsuits (AP)
• Ancient seal found in Jerusalem linked to ritual (AP)
• Tens of thousands of protesters pressure Putin (Reuters)
• Islamists kill dozens in Nigeria Christmas bombs (Reuters)
• Pope Christmas peace appeal marred by Nigeria blasts (Reuters)
• Biden speaks with Iraqi PM on violence (Reuters)
• Head of Arab mission reaches Syria amid more unrest (Reuters)
• IMF's Lagarde warns global economy threatened (Reuters)
• Powerful Darfur rebel chief dead, Sudan says (Reuters)
• Stores see busy, but not bang-up Christmas Eve (Reuters)
• Religiously active people more likely to engage in civic life, Pew study finds (The Christian Science Monitor)
• US-Russia ties: Chill over Syria replaces warmth of Obama's 'reset' policy (The Christian Science Monitor)