DERNA: People look at flood-damaged areas of Derna, Libya, on Thursday, September 14 (Esam Omran Al-Fetori/Reuters)

TSIOLKOVSKY: North Korean leader Kim Jong Un, left, and Russian President Vladimir Putin visit the construction site of a rocket launch complex in Tsiolkovsky, Russia, on Wednesday, September 13. Putin has said Russia is considering and discussing some military cooperation with North Korea (Contributor/Getty Images)

AMIZMIZ: A man reads a book on top of a house in Amizmiz, Morocco, days after a devastating earthquake on Saturday, September 9 (Ximena Borrazás/SOPA Images/Sipa USA/AP)

MEXICO CITY: Journalist Jaime Maussan, while speaking to Mexico's Congress, presented what he claimed were two "nonhuman" remains during a hearing about UFOs on Tuesday, September 12. Maussan said the remains were recovered in Peru, but according to the Reuters news agency, Peruvian Culture Minister Leslie Urteaga said no scientific institution in her country had identified the remains as nonhuman (Henry Romero/Reuters)

FLUSHING MEADOWS: Coco Gauff celebrates after winning the US Open tennis tournament on Saturday, September 9. It is the 19-year-old's first grand slam title, and she is the first American teenager to win the US Open since Serena Williams in 1999 (Mike Segar/Reuters)

RIO DE JANEIRO: People enjoy Copacabana Beach in Rio de Janeiro on Sunday, September 10 (Mauro Pimentel/AFP/Getty Images)

NEW YORK: A rainbow stretches across the New York City sky on Monday, September 11 (Andres Kudacki/AP)

LONDON: A woman walks past a poster featuring Caravaggio's "The Supper at Emmaus" outside the National Gallery in London on Wednesday, September 13 (Kin Cheung/AP)

SEGLVIK: Several thousand jellyfish swim off the coast of Seglvik, Norway, on Monday, September 11 (Olivier Morin/AFP/Getty Images)

VICTOR: Sheep belonging to the Siddoway ranch are seen in a corral at the top of Pine Creek Pass near Victor, Idaho, on Saturday, September 9 (Natalie Behring/Getty Images)