Plot: 2010/04/08 Headlines: US, Russia Sign Nuclear Reduction Pact; Opposition Claims Control of Kyrgyzstan Following Deadly Clashes; US Suspends Flights at Kyrgyz Military Base; Rescuers Enter West Va. Coal Mine; SEC Proposes Banks Share Losses on Asset-Backed Securities; Greenspan Defends Record at Financial Crisis Hearing; 2 Arrested for Healthcare-Linked Threats to Dem