Prince Charles kisses Princess Diana's hand on the balcony of Buckingham Palace on their wedding day, July 29, 1981. AP/File
Jacqueline Lee Bouvier married John F. Kennedy on September 12, 1953 in Newport, R.I. Newscom/File
Mia Farrow wore a simple white dress at her wedding with Frank Sinatra in Las Vegas on July 19, 1966. KPA/Zuma Press/Newscom/File
The stylish Mrs. Wallis Simpson wed Edward VIII, who abdicated the British throne to marry her, at Chateau de Cande in France on June 3, 1937. AKG-Images/Newscom/File
In this image taken from video, John F. Kennedy, Jr. kisses the hand of his bride, Carolyn Bessette, as they leave their wedding ceremony on Cumberland Island, Ga., on Sept. 21, 1996. Ms. Bessette's slip of a wedding dress influenced bridal fashion as soon as it was made public. The couple died in a plane piloted by Mr. Kennedy in 1999. Newscom/File
Actress Grace Kelly poses for an official portrait on the day of her wedding to Prince Rainier III of Monaco on April 19, 1956. Dalmas/SIPA/Newscom/File
Marilyn Monroe looked uncharacteristically demure at her second wedding, this time to baseball great Joe DiMaggio. They eloped at San Francisco City Hall on January 14, 1954. Snap/Zuma Press/Newscom/File
Joanne Woodward married Paul Newman in 1958. Newscom/File
Beatles singer John Lennon and his new bride Yoko Ono hold their marriage certificate in Gibraltar on March 20, 1969. Newscom/File
Eleanor Roosevelt poses in her wedding dress. This is the only 'wedding' picture that exists, because no photos were taken at the wedding itself, which took place in New York on March 17, 1905.
Rolling Stones frontman Mick Jagger married Bianca Perez Morena de Macias in St. Tropez, France, on May 15, 1971. Zuma Press/Newscom/File
Glamorous actors Richard Burton and Elizabeth Taylor are photographed shortly after their first wedding on March 15, 1964. The tempestuous couple divorced in 1974, remarried in 1975, and divorced again in 1976.
Caroline Kennedy, daughter of former US President John F. Kennedy, married Edwin Arthur Schlossberg in Centerville, Mass., on July 19, 1986. Zuma Archive/Zuma Press/Newscom/File
Former US President George W. Bush and daughter Jenna Bush pose for a photographer prior to her wedding to Henry Hager at Prairie Chapel Ranch in Crawford, Texas, on May 10, 2008. Shealah Craighead/UPI Photo/Newscom/File
Chelsea Clinton, daughter of former US President Bill Clinton and Secretary of State Hillary Clinton, and her husband Marc Mezvinsky are shown during their wedding in Rhinebeck, New York, on July 31, 2010. Genevieve de Manio/HO/UPI/Newscom/File
Medical documents and ripped-up sick notes from a doctor suggest 27-year-old Andreas Lubitz may have hid an illness from his employers at Germanwings. But without a suicide note investigators can't be sure what was going through the pilot's mind.
ByMaria Cheng, AP Medical Writer
A disgruntled worker shoots up a workplace. A student opens fire at a high school. A pilot crashes a planeload of people into a mountainside.