This 1980 file photo shows British Prime Minister Margaret Thatcher in London. Thatcher died of a stroke Monday morning, April 8, 2013. She was 87.
In this Dec. 7, 2005 file photo, former South African President Nelson Mandela, 87, smiles the Mandela Foundation in Johannesburg. On Thursday, Dec. 5, 2013, Mandela died at the age of 95.
In this Feb. 12, 2002 file photo, former U.S. Surgeon General Dr. C. Everett Koop testifies in Concord, N.H. Koop, who raised the profile of the surgeon general by riveting America's attention on the then-emerging disease known as AIDS and by railing against smoking, died Feb. 25, 2013. He was 96.
In this Oct. 16, 2007 file photo, veteran White House correspondent Helen Thomas smiles as she leaves the White House after attending a briefing. Thomas, the White House correspondent who used her seat in the front row of history to grill nine presidents, died July 20, 2013. She was 92.
In this Feb. 4, 1998 file photo, writer Tom Clancy sits in his home in Calvert County, Md. Clancy, the bestselling author of more than 25 fiction and nonfiction books for the Penguin Group, died on Oct. 1, 2013 in Baltimore. He was 66.
In this Nov. 1, 2000 file photo, actress Jean Stapleton smiles during a news conference at Syracuse Stage in Syracuse, N.Y. Stapleton, the stage-trained character actress who played Archie Bunker's wife, the sweetly naive Edith, in TV's groundbreaking 1970s comedy "All in the Family," died May 31, 2013. She was 90.
In this Jan. 23, 2002 file photo, Venezuela's President Hugo Chavez waves to supporters during a government march commemorating the anniversary of Venezuelan democracy in Caracas, Venezuela. Chavez died March 5, 2013 at age 58.
In this April 18, 2007, file photo, former New York Mayor Ed Koch listens during the 9th annual National Action Network convention in New York. Koch, the combative politician who rescued the city from near-financial ruin during three City Hall terms, died Friday, Feb. 1, 2013. He was 88.
This Jan. 2009 file photo shows film critic and author Roger Ebert, recipient of the Honorary Life Member Award, at the Directors Guild of America Awards in Los Angeles. Ebert, the most famous and most popular film reviewer of his time, died April 4, 2013. He was 70.
In this May 6, 1997 file photo, comedian Jonathan Winters poses at a hotel in Beverly Hills, Calif. Winters, whose breakneck improvisations inspired Robin Williams, Jim Carrey and many others, died Thursday, April 11, 2013, at his Montecito, Calif., home of natural causes. He was 87.
In this July 30, 2000 file photo, Lou Reed performs on stage at the open air "Live at Sunset" concert in Zurich, Switzerland. Reed, the punk poet of rock 'n' roll who profoundly influenced generations of musicians as leader of the Velvet Underground and remained a vital solo performer for decades after, died Oct. 27, 2013. He was 71.
This 1987 file photo shows psychologist Dr. Joyce Brothers. Brothers, the pop psychologist who pioneered the television advice show in the 1950s and enjoyed a long and prolific career as a syndicated columnist, author, and television and film personality, died May 13, 2013.
In this Nov. 2, 2011, file photo, Sen. Frank Lautenberg, D-N.J., speaks during a news conference on Capitol Hill in Washington. Lautenberg, a multimillionaire New Jersey businessman and liberal who was called out of retirement for a second tour of duty in Congress, died Monday, June 3, 2013, at age 89.
In this Sept. 10, 2000 file photo, actor James Gandolfini holds his award for outstanding lead in a drama series for his work in "The Sopranos" at the 52nd Annual Primetime Emmy Awards in Los Angeles. Gandolfini died Wednesday, June 19, 2013, in Italy. He was 51.