A St. Louis County police officer looks at a black man who has been loaded into an ambulance after a police officer-involved shooting in Ferguson, Missouri August 9, 2015. REUTERS/Rick Wilking 

A black man is loaded into an ambulance after a police officer involved shooting in Ferguson, Missouri August 9, 2015. Two people were struck by gunfire in the midst of a late-night confrontation on Sunday between riot police and protesters, police said, after a day of peaceful events commemorating the fatal shooting of an unarmed black teenager by a white officer one year ago. REUTERS/Rick Wilking 

Former Utah Attorney General Mark Shurtleff (L) listens outside a 3rd District Courtroom as his attorney Rick Van Wagoner addresses the media after a hearing on charges relating to alleged misconduct while in office in Salt Lake City, Utah June 15, 2015. REUTERS/Jim Urquhart 

Former Utah Attorney General Mark Shurtleff (C) walks into a 3rd District Courtroom with his attorney Rick Van Wagoner (R) and his daughter Annie Shurtleff (L) for a hearing on charges relating to alleged misconduct while in office in Salt Lake City, Utah June 15, 2015. REUTERS/Jim Urquhart 

An old wagon is seen against the backdrop of the Superstition Mountains, close to the last known address for David Spargo and his company Asseterra in Apache Junction, Arizona, July 6, 2011. Picture taken July 6, 2011. To match Special Report PHANTOM-BOND/ REUTERS/Rick Scuteri (UNITED STATES - Tags: BUSINESS) 

General Motors Corp. headquarters is seen from a warehouse district in downtown Detroit, Michigan in this file image from November 7, 2008. U.S. President Barack Obama said on March 30, 2009 that Rick Wagoner's departure as General Motors' chairman was a recognition that the company needs new direction even as he said the government did not want to run GM. A day after the White House let out word that Wagoner would be stepping down, Obama said the executive's departure was not meant as a condemnation. REUTERS/Rebecca Cook/Files (UNITED STATES TRANSPORT BUSINESS) 

General Motors headquarters is seen in downtown Detroit, Michigan in this file image from December 9, 2008. U.S. President Barack Obama said on March 30, 2009 that Rick Wagoner's departure as General Motors' chairman was a recognition that the company needs new direction even as he said the government did not want to run GM. A day after the White House let out word that Wagoner would be stepping down, Obama said the executive's departure was not meant as a condemnation. REUTERS/Carlos Barria/Files (UNITED STATES TRANSPORT POLITICS BUSINESS) 

U.S. President Barack Obama speaks about the auto industry in the Grand Foyer of the White House in Washington, March 30, 2009. Obama said on Monday Rick Wagoner's departure as General Motors' (GM) chairman was a recognition that the company needs new direction even as he said the government did not want to run GM. REUTERS/Larry Downing (UNITED STATES POLITICS BUSINESS TRANSPORT) 

U.S. President Barack Obama speaks about the auto industry in the Grand Foyer of the White House in Washington, March 30, 2009. Obama said on Monday Rick Wagoner's departure as General Motors' (GM) chairman was a recognition that the company needs new direction even as he said the government did not want to run GM. REUTERS/Larry Downing (UNITED STATES POLITICS BUSINESS TRANSPORT) 

U.S. President Barack Obama speaks about the auto industry in the Grand Foyer of the White House in Washington, March 30, 2009. Obama said on Monday Rick Wagoner's departure as General Motors' (GM) chairman was a recognition that the company needs new direction even as he said the government did not want to run GM. REUTERS/Larry Downing (UNITED STATES POLITICS BUSINESS TRANSPORT) 

U.S. President Barack Obama speaks about the auto industry next to U.S. Treasury Secretary Timothy Geithner (L) in the Grand Foyer of the White House in Washington March 30, 2009. Obama said on Monday Rick Wagoner's departure as General Motors' (GM) chairman was a recognition that the company needs new direction even as he said the government did not want to run GM. REUTERS/Larry Downing (UNITED STATES TRANSPORT POLITICS BUSINESS IMAGE OF THE DAY TOP PICTURE) 

General Motors chief operating officer Fritz Henderson is seen at a news conference at General Motors World Headquarters in Detroit, Michigan in this file photo taken on December 12, 2008. Henderson is the No. 2 executive at the automaker and widely considered to the leading internal candidate as General Motors Corp Chief Executive Rick Wagoner's successor. Wagoner resigned under pressure from the Obama administration on March 29, 2009 as the government prepared to announce a second bailout for the company and its smaller rival Chrysler LLC. REUTERS/Rebecca Cook/Files (UNITED STATES TRANSPORT BUSINESS HEADSHOT) 

A bumper sticker showing support for the American auto industry is seen under the windshield wiper blade of a vehicle in Royal Oak, Michigan March 28, 2009. General Motors Corp Chief Executive Rick Wagoner resigned under pressure from the Obama administration on Sunday as the government prepared to announce a second bailout for the company and its smaller rival Chrysler LLC. Picture was taken March 28, 2009. REUTERS/Rebecca Cook (UNITED STATES TRANSPORT BUSINESS) 

General Motors Corp.'s world headquarters is seen along the Detroit River in Detroit, Michigan in this file image from November, 18, 2008. U.S. President Barack Obama said on March 30, 2009 that Rick Wagoner's departure as General Motors' chairman was a recognition that the company needs new direction even as he said the government did not want to run GM. A day after the White House let out word that Wagoner would be stepping down, Obama said the executive's departure was not meant as a condemnation. REUTERS/Rebecca Cook/Files (UNITED STATES BUSINESS TRANSPORT) 

German Economics Minister Karl-Theodor zu Guttenberg (R) watches while General Motors CEO Rick Wagoner signs the guest book at the German ambassador's residence in Washington March 16, 2009. REUTERS/Molly Riley (UNITED STATES TRANSPORT BUSINESS POLITICS IMAGE OF THE DAY TOP PICTURE) 

German Economics Minister Karl-Theodor zu Guttenberg (R) and General Motors CEO Rick Wagoner wait while General Motors COO Fritz Henderson signs the guest book at the German ambassador's residence in Washington March 16, 2009. REUTERS/Molly Riley (UNITED STATES TRANSPORT BUSINESS POLITICS) 

German Economics Minister Karl-Theodor zu Guttenberg (L) meets with General Motors CEO Rick Wagoner (2nd R), General Motors COO Fritz Henderson and German Ambassador Klaus Scharioth (R) at the German ambassador's residence in Washington March 16, 2009. REUTERS/Molly Riley (UNITED STATES TRANSPORT BUSINESS POLITICS) 

General Motors CEO Rick Wagoner and General Motors COO Fritz Henderson (L) arrive for a meeting with German Economics Minister Karl-Theodor zu Guttenberg at the German ambassador's residence in Washington March 16, 2009. REUTERS/Molly Riley (UNITED STATES TRANSPORT BUSINESS POLITICS) 

General Motors CEO Rick Wagoner arrives for a meeting with German Economics Minister Karl-Theodor zu Guttenberg at the German ambassador's residence in Washington March 16, 2009. REUTERS/Molly Riley (UNITED STATES TRANSPORT BUSINESS POLITICS) 

German Economics Minister Karl-Theodor zu Guttenberg (L) meets with General Motors CEO Rick Wagoner (R) and General Motors COO Fritz Henderson at the German ambassador's residence in Washington March 16, 2009. REUTERS/Molly Riley (UNITED STATES TRANSPORT BUSINESS POLITICS) 

German Economics Minister Karl-Theodor zu Guttenberg (L) meets with General Motors CEO Rick Wagoner (R) and General Motors COO Fritz Henderson at the German ambassador's residence in Washington March 16, 2009. REUTERS/Molly Riley (UNITED STATES TRANSPORT BUSINESS POLITICS) 

General Motors Chief Executive Rick Wagoner (C) is pictured during a meeting between U.S. President Barack Obama (not pictured) and other business leaders at a hotel in Washington March 12, 2009. REUTERS/Jason Reed (UNITED STATES POLITICS BUSINESS) 

Rick Wagoner, Chairman and Chief Executive Officer of General Motors, listens during a meeting between U.S. President Barack Obama and business leaders at a hotel in Washington, March 12, 2009. REUTERS/Jason Reed (UNITED STATES POLITICS BUSINESS HEADSHOT TRANSPORT) 

Rick Wagoner, Chairman and Chief Executive Officer of General Motors, wipes his eye during a meeting between U.S. President Barack Obama and business leaders at a hotel in Washington, March 12, 2009. REUTERS/Jason Reed (UNITED STATES POLITICS TRANSPORT BUSINESS HEADSHOT) 

General Motors Chairman and CEO Rick Wagoner addresses the media during a news conference at GM world headquarters in Detroit, Michigan February 17, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

A burnt out Opel Astra is pictured on a car transporter following an accident on the highway A5 near Heppenheim, some 60 kilometers (37 miles) south of Frankfurt February 19, 2009. General Motors Corp has no concrete plans to shut its German unit Opel's factories, Juergen Ruettgers, the state premier of North Rhine-Westphalia, said after meeting GM's head Rick Wagoner in Detroit. REUTERS/Alex Grimm (GERMANY) 

Extinguishing foam and grime cover the logo of a burnt out brand new Opel Astra, following an accident involving a car transporter on the highway A5 near Heppenheim, some 60 kilometers (37 miles) south of Frankfurt February 19, 2009. General Motors Corp has no concrete plans to shut its German unit Opel's factories, Juergen Ruettgers, the state premier of North Rhine-Westphalia, said after meeting GM's head Rick Wagoner in Detroit. REUTERS/Alex Grimm (GERMANY) 

A charred Opel logo is pictured on the steering wheel of a burnt out brand new Opel Astra, following an accident involving a car transporter on the highway A5 near Heppenheim, some 60 kilometers (37 miles) south of Frankfurt February 19, 2009. General Motors Corp has no concrete plans to shut its German unit Opel's factories, Juergen Ruettgers, the state premier of North Rhine-Westphalia, said after meeting GM's head Rick Wagoner in Detroit. REUTERS/Alex Grimm (GERMANY) 

A charred Opel logo is pictured on the steering wheel of a burnt out Opel Astra, following an accident involving a car transporter on the highway A5 near Heppenheim, some 60 kilometers (37 miles) south of Frankfurt February 19, 2009. General Motors Corp has no concrete plans to shut its German unit Opel's factories, Juergen Ruettgers, the state premier of North Rhine-Westphalia, said after meeting GM's head Rick Wagoner in Detroit. REUTERS/Alex Grimm (GERMANY) 

A charred Opel logo is pictured on the steering wheel of a burnt out Opel Astra, following an accident involving a car transporter on the highway A5 near Heppenheim, some 60 kilometers (37 miles) south of Frankfurt February 19, 2009. General Motors Corp has no concrete plans to shut its German unit Opel's factories, Juergen Ruettgers, the state premier of North Rhine-Westphalia, said after meeting GM's head Rick Wagoner in Detroit. REUTERS/Alex Grimm (GERMANY) 

General Motors Chairman and CEO Rick Wagoner addresses the media during a news conference at GM World Headquarters in Detroit, Michigan February 17, 2009. General Motors Corp's European Saab brand could file for reorganization as early as this month, GM said on Tuesday, adding that it still hoped to reach an agreement with Sweden on aid for the luxury brand. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and CEO Rick Wagoner addresses the media during a news conference at GM World Headquarters in Detroit, Michigan February 17, 2009. General Motors Corp's European Saab brand could file for reorganization as early as this month, GM said on Tuesday, adding that it still hoped to reach an agreement with Sweden on aid for the luxury brand. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and CEO Rick Wagoner addresses the media during a news conference at GM World Headquarters in Detroit, Michigan February 17, 2009. General Motors Corp's European Saab brand could file for reorganization as early as this month, GM said on Tuesday, adding that it still hoped to reach an agreement with Sweden on aid for the luxury brand. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and CEO Rick Wagoner addresses the media during a news conference at GM World Headquarters in Detroit, Michigan February 17, 2009. General Motors Corp's European Saab brand could file for reorganization as early as this month, GM said on Tuesday, adding that it still hoped to reach an agreement with Sweden on aid for the luxury brand. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and CEO Rick Wagoner listens to a question from the media during a news conference at GM World Headquarters in Detroit, Michigan February 17, 2009. General Motors Corp's European Saab brand could file for reorganization as early as this month, GM said on Tuesday, adding that it still hoped to reach an agreement with Sweden on aid for the luxury brand. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner addresses the media during a news conference at GM World Headquarters in Detroit, Michigan February1 7, 2009. Shares of General Motors Corp fell 12 percent on Tuesday as the automaker prepared to submit a new survival plan to U.S. officials later in the day under the terms of its $13.4 billion government bailout. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors CEO Rick Wagoner (R) stands with Ann Sastry (2nd R), GM Vice Chairman Bob Lutz and LG Chem CEO Peter Kim (L), of South Korea, in front of a model of the lithium-ion battery pack that will be manufactured for the upcoming Chevrolet Volt during press days of the North American International Auto Show in Detroit, Michigan January 12, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors CEO Rick Wagoner stands in front of a model of a lithium-icon battery pack that the auto maker will assemble in Michigan for the upcoming Chevrolet Volt as he addresses the media during press days of the North American International Auto Show in Detroit, Michigan January 12, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors CEO Rick Wagoner stands next to a Chevrolet Volt as he addresses the media during press days of the North American International Auto Show in Detroit, Michigan January 12, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors CEO Rick Wagoner stands next to a Chevrolet Volt as he addresses the media during press days of the North American International Auto Show in Detroit, Michigan January 12, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chief Executive Officer Rick Wagoner (R) and Vice Chairman Bob Lutz talk to each other before the start of a news conference during press days of the North American International Auto Show in Detroit, Michigan January 12, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and CEO Rick Wagoner pauses before a vehicle reveal during press days at the North American International Auto Show in Detroit, Michigan, January 11, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and CEO Rick Wagoner pauses before a vehicle reveal during press days at the North American International Auto Show in Detroit, Michigan, January 11, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and CEO Rick Wagoner pauses before a vehicle reveal during press days at the North American International Auto Show in Detroit, Michigan, January 11, 2009. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner addresses the media during a news conference at GM world headquarters in Detroit, Michigan December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner addresses the media during a news conference at GM world headquarters in Detroit, Michigan December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner addresses the media during a news conference at GM world headquarters in Detroit, Michigan December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner addresses the media during a news conference at GM world headquarters in Detroit, Michigan December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner attends a news conference at GM World Headquarters in Detroit December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner speaks during his news conference at GM World Headquarters in Detroit December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner attends a news conference at GM World Headquarters in Detroit December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit.REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner attends a news conference at GM World Headquarters in Detroit December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner speaks to the media during a news conference at GM world headquarters in Detroit, Michigan December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner speaks during his news conference at GM World Headquarters in Detroit December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner speaks during his news conference at GM World Headquarters in Detroit December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors Chairman and Chief Executive Rick Wagoner speaks during his news conference at GM World Headquarters in Detroit December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES) 

General Motors CEO Rick Wagoner (R) arrives to testify about a proposed bailout plan for the US domestic auto industry at a hearing of the Senate Banking Committee on Capitol Hill in Washington, December 4, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

General Motors CEO Rick Wagoner (C) wipes his brow as he arrives to testify about a proposed bailout plan for the US domestic auto industry at a hearing of the Senate Banking Committee on Capitol Hill in Washington, December 4, 2008. REUTERS/Jonathan Ernst (UNITED STATES) 

General Motors Chairman and CEO Rick Wagoner stands next to a Chevrolet Volt at a General Motors centennial celebration at GM world headquarters in Detroit, Michigan September 16, 2008. General Motors Corp unveiled the production version of its much-anticipated Chevrolet Volt, a plug-in electric car that is the centerpiece of the automaker's effort to move away from gas-guzzling SUVs. REUTERS/Rebecca Cook (UNITED STATES) 

(L-R) General Motors Chairman and CEO Rick Wagoner, Vice Chairman Bob Lutz and President & COO Fritz Henderson stand next to a Chevrolet Volt at a General Motors centennial celebration at GM world headquarters in Detroit, Michigan September 16, 2008. General Motors Corp unveiled the production version of its much-anticipated Chevrolet Volt, a plug-in electric car that is the centerpiece of the automaker's effort to move away from gas-guzzling SUVs. REUTERS/Rebecca Cook (UNITED STATES)