Robin Grinholz, of New York, lays flowers on the Imagine mosaic in the Strawberry Fields section of New York City's Central Park on Dec. 8, the 30th anniversary of the death of rock music legend John Lennon. Richard Drew/AP
A doorman stands outside the Dakota on New York City's Upper West Side on Dec. 8, where John Lennon was shot 30 years ago. Richard Drew/AP
John Lennon-related buttons are sold in Strawberry Fields in New York City's Central Park on Oct. 9, the day that would have been John Lennon's 70th birthday. Tina Fineberg/AP
Julian (l.) and Cynthia Lennon, the son and former wife of John Lennon, appear at the unveiling of the Peace and Harmony monument in Chavasse Parke in Liverpool, England, on Oct. 9. The inscription reads, 'Peace on Earth for the Conservation of Life. In Harmony of John Lennon 1940-1980.' Tim Hales/AP
People stand around the Imagine Peace Tower as it is illuminated on Videy Island in Kollafjordur Bay near Reykjavik, Iceland, on Oct. 9. The tower, a memorial to John Lennon from his widow Yoko Ono, consists of searchlights pointed high into the sky from a white stone monument with the words "Imagine Peace" carved into it in 24 languages. Ingolfur Juliusson/Reuters
Yoko Ono, widow of John Lennon, former Beatles drummer Ringo Starr, and Reykjavik Mayor Jon Gnarr sing 'Give Peace a Chance' in Reykjavik on Oct. 9. The event was held in conjunction with what would have been the 70th birthday of John Lennon. Ingolfur Juliusson/Reuters
Japanese artist and musician Yoko Ono poses by a plaque erected to John Lennon during an unveiling ceremony at 34 Montagu Square in London, England, on Oct. 23. John Lennon is commemorated with an English Heritage blue plaque in celebration of his life and contribution to music at the apartment where he shared his first home with Yoko Ono. Sang Tan/AP
John Lennon look-a-like Alan Swoffer poses on Oct. 18 with the new official British commemorative John Lennon £5 coin, which went on sale on Oct. 29. The former Beatle will join William Shakespeare, Winston Churchill, Charles Darwin, and Florence Nightingale among British luminaries whose images have graced special coins. Geoff Caddick/The Royal Mint/AP
James Lehr, of Bayonne, N.J., displays a tattoo of John Lennon on his arm as he and others gather in Strawberry Fields in New York City's Central Park on Oct. 9. Tina Fineberg/AP
While officials agree that conditions are much improved in Sierra Leone, Liberia, and Guinea, it's unclear if this Ebola outbreak could have been responded to quicker, with less cost and suffering.
ByKrista Larson and Maria Cheng, Associated Press
A top U.N. official in the fight against Ebola greeted just three patients at one treatment center he visited this week in Sierra Leone. Families in Liberia are no longer required to cremate the remains of loved ones to halt the spread of the virulent disease.