Police arrest anti-war activist Cindy Sheehan (3rd L, orange shirt) and fellow anti-drone protesters when they pressed onto the premises after attempting to deliver a letter to U.S. Central Intelligence Agency (CIA) Director John Brennan at CIA headquarters in Langley, Virginia, June 29, 2013. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS MILITARY CIVIL UNREST) 

Police arrest anti-war protester Cindy Sheehan after she crossed a barrier in front of the White House during an anti-war demonstration marking the seventh anniversary of the invasion of Iraq, in Washington March 20, 2010. REUTERS/Jose Luis Magana (UNITED STATES - Tags: POLITICS CIVIL UNREST CONFLICT ANNIVERSARY) 

Police arrest anti-war protester Cindy Sheehan after she crossed a barrier in front of the White House during an anti-war demonstration marking the seventh anniversary of the invasion of Iraq, in Washington March 20, 2010. REUTERS/Jose Luis Magana (UNITED STATES - Tags: POLITICS CIVIL UNREST CONFLICT ANNIVERSARY) 

Police arrest anti-war protester Cindy Sheehan (2nd L) after she crossed a barrier in front of the White House during an anti-war demonstration marking the seventh anniversary of the invasion of Iraq, in Washington March 20, 2010. REUTERS/Jose Luis Magana (UNITED STATES - Tags: POLITICS CIVIL UNREST CONFLICT ANNIVERSARY) 

Police arrest anti-war protester Cindy Sheehan in front of the White House during an anti-war demonstration marking the seventh anniversary of the invasion of Iraq, in Washington March 20, 2010. REUTERS/Jose Luis Magana (UNITED STATES - Tags: POLITICS CIVIL UNREST CONFLICT ANNIVERSARY) 

Anti-war activist Cindy Sheehan takes part in a rally in front of the White House in Washington October 5, 2009. REUTERS/Kevin Lamarque (UNITED STATES POLITICS) 

Activist Cindy Sheehan (R), who is running as an independent for the U.S. House of Representatives against House Speaker Nancy Pelosi (D-CA), is embraced by a supporter after taping a television spot at City Hall in San Francisco, California October 20, 2008. REUTERS/Robert Galbraith (UNITED STATES) 

Activist Cindy Sheehan (C), who is running as an independent for the U.S. House of Representatives against House Speaker Nancy Pelosi (D-CA), walks with supporters after taping a television spot in San Francisco, California October 20, 2008. REUTERS/Robert Galbraith (UNITED STATES) 

Activist Cindy Sheehan (C), who is running as an independent for the U.S. House of Representatives against House Speaker Nancy Pelosi (D-CA), meets a supporter after taping a television spot at City Hall in San Francisco, California October 20, 2008. REUTERS/Robert Galbraith (UNITED STATES) 

Activist Cindy Sheehan, who is running as an independent for the U.S. House of Representatives against House Speaker Nancy Pelosi (D-CA), is pictured speaking at City Hall while taping a television spot in San Francisco, California October 20, 2008. REUTERS/Robert Galbraith (UNITED STATES) 

Cindy Sheehan, who emerged as a leading peace activist after her son Casey was killed in Iraq in 2004, speaks on the steps of the state capitol in Denver, Colorado August 24, 2008. Denver will host the upcoming Democratic National Convention, which begins Monday August 25. REUTERS/Eric Thayer (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

Activist Cindy Sheehan speaks on the steps of the state capitol in Denver, Colorado August 24, 2008. Denver will host the upcoming Democratic National Convention, which begins Monday August 25. REUTERS/Eric Thayer (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

Activist Cindy Sheehan speaks on the steps of the state capitol in Denver, Colorado August 24, 2008. Denver will host the upcoming Democratic National Convention, which begins Monday August 25. REUTERS/Eric Thayer (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

A roadside wish in front of the property formerly owned by anti-war protester Cindy Sheehan, called Camp Casey, celebrates the wedding of U.S. President George W. Bush's daughter, Jenna Bush, and her fiance, Henry Hager, in Crawford, Texas, May 10, 2008. Bush and Hager are scheduled to wed this evening at Bush's Central Texas ranch. REUTERS/Larry Downing (UNITED STATES) 

U.S. peace activist Cindy Sheehan speaks in San Francisco at a candlelit vigil held to mark the 4,000 Americans killed in the Iraq war March 24, 2008. The number of U.S. soldiers to die in Iraq has reached 4,000, the U.S. military said on Monday, just days after the fifth anniversary of a war that President George W. Bush says the United States is on track to win. REUTERS/ Erin Siegal (UNITED STATES) 

U.S. peace activist Cindy Sheehan talks during a news conference at the lawyers syndicate in Cairo February 14, 2008. Sheehan pressed Egypt on Wednesday to free members of the opposition Muslim Brotherhood who are on trial in a military court, urging leniency for the sake of their families. REUTERS/ Asmaa Waguih (EGYPT) 

A daughter of an Egyptian prisoner looks at a banner saying "release my father" as U.S. activist Cindy Sheehan takes part in a rally in Cairo February 13, 2008. The protesters were asking the Egyptian government to show leniency towards the families of Muslim Brotherhood members and to return those members in Egyptian prisons back to their wives. REUTERS/Amr Dalsh (EGYPT) 

Protesters carrying banners saying "No to military trials" attend a rally along with U.S. activist Cindy Sheehan in Cairo February 13, 2008. The protesters were asking the Egyptian government to show leniency towards the families of Muslim Brotherhood members and to return those members in Egyptian prisons back to their wives. REUTERS/Amr Dalsh (EGYPT) 

A daughter of an Egyptian prisoner cries as U.S. activist Cindy Sheehan takes part in a rally in Cairo February 13, 2008. The protesters were asking the Egyptian government to show leniency towards the families of Muslim Brotherhood members and to return those members in Egyptian prisons back to their wives. REUTERS/Amr Dalsh (EGYPT) 

U.S. activist Cindy Sheehan takes part in a rally in Cairo February 13, 2008. The protesters were asking the Egyptian government to show leniency towards the families of Muslim Brotherhood members and to return those members in Egyptian prisons back to their wives. REUTERS/Amr Dalsh (EGYPT) 

U.S. activist Cindy Sheehan takes part in a rally in Cairo February 13, 2008. The protesters were asking the Egyptian government to show leniency towards the families of Muslim Brotherhood members and to return those members in Egyptian prisons back to their wives. REUTERS/Amr Dalsh (EGYPT) 

Activist Cindy Sheehan wears "Impeach Bush" socks during protest against the war in Iraq in San Francisco, California, October 27, 2007. Thousands of people marched through San Francisco streets demanding an end to the war in Iraq. REUTERS/Kimberly White (UNITED STATES) 

Cindy Sheehan (C) and others protest against the war in Iraq in San Francisco, California, October 27, 2007. Thousands of people marched through San Francisco streets demanding an end to the war in Iraq. REUTERS/Kimberly White (UNITED STATES) 

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An elderly Iraqi woman with traditional tattoos on her face and hands looks at U.S. soldiers from the 2nd battalion, 32nd Field Artillery brigade search her home during their joint large scale operation with Iraqi troops in Baghdad August 13, 2007. REUTERS/Damir Sagolj (IRAQ)

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Peace activist Cindy Sheehan has her son's name, Casey, who was killed in Iraq in 2004, on her ankle at a press conference where she announced she will run for Congress in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan (R) shakes a man's hand after holding a press conference where she announced she will run for Congress in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan announces at a news conference she will run for Congress in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan cries over a picture of her son Casey who was killed in Iraq in 2004, at a news conference where she announced she will run for Congress in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan (C) holds a news conference where she announced she will run for Congress in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan cries while refering to her son Casey who was killed in Iraq in 2004, at a press conference where she announced she will run for Congress in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan has her son's name, Casey, who was killed in Iraq in 2004, on her ankle at a press conference where she announced she will run for Congress in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan cries while refering to her son Casey who was killed in Iraq in 2004, at a press conference where she announced she will run for Congress in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan announces that she will run for Congress during a news conference in San Francisco, California, August 9, 2007. Sheehan announced her race for California's 8th district, challenging Democratic leader Nancy Pelosi in the 2008 elections. REUTERS/Kimberly White (UNITED STATES) 

Peace activist Cindy Sheehan takes part in a march to deliver over 1,000,000 signatures to Congressman John Conyers appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney in Washington, DC, July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES - Tags: POLITICS) BEST QUALITY AVAILABLE 

Peace activist Cindy Sheehan takes part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES) 

Peace activist Cindy Sheehan takes part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES) 

Peace activist Cindy Sheehan takes part in a march to deliver more than 1,000,000 signatures to Congressman John Conyers, appealing to him to begin impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney, in Washington July 23, 2007. REUTERS/Joshua Roberts (UNITED STATES) For best quality see GM1E64R0SAK01. 

Peace activist Cindy Sheehan (C) holds a sign with fellow activists as they pose for a picture at the site of her first protest near U.S. President George W. Bush's ranch in Crawford, Texas July 8, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan (R) shows the site of her protest near U.S. President George W. Bush's ranch to radio talk-show host Bree Walker (L) as an unidentified supporter looks on in Crawford, Texas July 8, 2007. Sheehan sold her Crawford property, called Camp Casey, to Walker. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan (L) shows the site of her first protest near U.S. President George W. Bush's ranch to radio talk-show host Bree Walker (R) in Crawford, Texas July 8, 2007. Sheehan sold her Crawford property, called Camp Casey, to Walker. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan (R) shows the site of her first protest near U.S. President George W. Bush's ranch to radio talk-show host Bree Walker (L) in Crawford, Texas July 8, 2007. Sheehan sold her Crawford property, called Camp Casey, to Walker. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan (L) hugs radio talk-show host Bree Walker (R) as they tour the site of Sheehan's first protest near U.S. President George W. Bush's ranch in Crawford, Texas July 8, 2007. Sheehan sold her Crawford property, called Camp Casey, to Walker. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan (R) shows the site of her first protest near U.S. President George W. Bush's ranch to radio talk-show host Bree Walker (L) in Crawford, Texas July 8, 2007. Sheehan sold her Crawford property, called Camp Casey, to Walker. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan pauses while giving an interview at "Camp Casey", a protest site near President Bush's ranch in Crawford, Texas July 7, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan addresses supporters before turning the deed to her land, "Camp Casey", a protest site near President Bush's ranch, over to radio talk-show host Bree Walker in Crawford, Texas July 7, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan talks with friends after she handed the deed to her land, "Camp Casey", a protest site near President Bush's ranch, over to radio talk-show host Bree Walker in Crawford, Texas July 7, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan (R) talks to a crowd of supporters after turning the deed to her land, "Camp Casey", a protest site near President Bush's ranch, over to radio talk-show host Bree Walker (L) in Crawford, Texas July 7, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan (R) walks with Anne Pritchett (L) after turning the deed to her land, "Camp Casey", a protest site near President Bush's ranch, over to radio talk-show host Bree Walker in Crawford, Texas July 7, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan talks to friends and supporters after turning the deed to her land, "Camp Casey", a protest site near President Bush's ranch, over to radio talk-show host Bree Walker in Crawford, Texas July 7, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan is hugged by supporters before turning the deed to her land, "Camp Casey", a protest site near President Bush's ranch, over to radio talk-show host Bree Walker in Crawford, Texas July 7, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

Peace activist Cindy Sheehan holds the deed to her land, "Camp Casey," shortly before turning the deed over to Bree Walker in Crawford, Texas July 7, 2007. REUTERS/Jessica Rinaldi (UNITED STATES) 

A general view of war protester Cindy Sheehan's five-acre property in Crawford, Texas June 16, 2007. Sheehan has announced she will sell her property, located near U.S. President George W. Bush's ranch and named after her fallen son, Casey, to a California radio talk-show host for $87,000 who intends to preserve it as a peace memorial and keep it open to protesters. REUTERS/Larry Downing (UNITED STATES) 

A general view of war protester Cindy Sheehan's five-acre property in Crawford, Texas June 16, 2007. Sheehan has announced she will sell her property, located near U.S. President George W. Bush's ranch and named after her fallen son, Casey, to a California radio talk-show host for $87,000 who intends to preserve it as a peace memorial and keep it open to protesters. REUTERS/Larry Downing (UNITED STATES) 

Peace activist Cindy Sheehan hugs a fellow anti-war protester during a rally in front of the White House in Washington Washington May 14, 2007. REUTERS/Kevin Lamarque (UNITED STATES) 

Peace activist Cindy Sheehan takes part in an anti-war rally in front of the White House in Washington May 14, 2007. REUTERS/Kevin Lamarque (UNITED STATES) 

An anti-war activist from Code Pink shows a brochure with the U.S. Constitution during a rally on Capitol Hill in Washington April 25, 2007. Anti-war activist Cindy Sheehan, Rep. Dennis Kucinich (D-OH) and various activist groups are calling for the impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney. REUTERS/Yuri Gripas (UNITED STATES) 

Anti-war activists from Code Pink shout during a rally on Capitol Hill in Washington April 25, 2007. Anti-war activist Cindy Sheehan, Rep. Dennis Kucinich (D-OH) and various activist groups are calling for the impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney. REUTERS/Yuri Gripas (UNITED STATES) 

Anti-war activist Cindy Sheehan speaks during a rally on Capitol Hill in Washington April 25, 2007. Sheehan, Rep. Dennis Kucinich (D-OH) and various activist groups are calling for the impeachment proceedings against U.S. President George W Bush and Vice President Dick Cheney. REUTERS/Yuri Gripas (UNITED STATES) 

Rep. Dennis Kucinich (D-OH) speaks during a rally on Capitol Hill in Washington April 25, 2007. Kucinich, anti-war activist Cindy Sheehan and various activist groups are calling for the impeachment proceedings against U.S. President George W. Bush and Vice President Dick Cheney. REUTERS/Yuri Gripas (UNITED STATES)