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job, to claim leverage in a mutually dependent but volatile relationship.
• Obama needs Russia to help, or at least not hurt, U.S. foreign policy aims in the Mideast and Afghanistan. Putin needs the United States as a foil for his argument that Russia doesn't get its due as a great power.
• Obama and Putin are set to meet on the sidelines of the Group of 20 economic gathering in Mexico that will otherwise focus largely on the European economic crisis. The summit, however, will provide a natural forum for sideline discussions of the crisis in Syria as well as diplomatic efforts to head off a confrontation with Iran.
• Russia is a linchpin in several U.S. foreign policy goals. Chief among them are the international effort to deny Iran a nuclear weapon and a smooth shutdown of the Afghanistan war. Attacks on anti-government protesters in Syria and the threat of

civil war in the Mideast nation pose the most immediate crisis.
• Russia's membership in numerous world bodies and its veto power at the U.N. Security Council give it leverage beyond its economic or military power.
• ___

• TORONTO (AP) -- A massive stage collapse hours before a Radiohead concert was to begin Saturday left one person dead and three others injured, officials said.
• Emergency Medical Services deputy commander David Viljakainen said a man who was trapped under the rubble was pronounced dead at the scene. Officials said he was in his mid-30s.
• A 45-year-old man was hospitalized with a head injury and two others were treated at the scene for minor injuries at the Downsview Park venue, said Viljakainen.
• The venue said on its website that the sold-out concert was canceled.
• Fire Services Platoon Chief Tony Bellavance said officials were alerted to a person trapped under the rubble and crews assisted in extracting the victim. "It was a crushing injury that killed the man," he said.
• ___

• CHICAGO (AP) -- Sweet home Chicago. President Barack Obama is back in the

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