A subway train derailed Tuesday deep below Moscow's streets, twisting and mangling crowded rail cars at the height of the morning rush hour. At least 21 people were killed, Russian officials said, and 136 were hospitalized, many with serious injuries.
The Russian capital's airports and transit systems have been a prime target for terrorists over the past two decades, but multiple officials vigorously dismissed terrorism as a possible cause.
The Pakistani teen who survived a Taliban assassination attempt in 2012 marked her 17th birthday Monday with a visit to Nigeria and urged Islamic extremists to free the 219 schoolgirls who were kidnapped there, calling them her "sisters."
Malala Yousafzai, who has become an international symbol for women's rights in the face of hard-line Islam, said Nigeria's president promised to meet for the first time with the abducted girls' parents.
The shipwrecked Costa Concordia was successfully refloated Monday in preparation to be towed away for scrapping, 30 months after it struck a reef and capsized, killing 32 people.
Authorities expressed satisfaction that the operation to float the Concordia from an underwater platform had proceeded without a hitch. Technicians later shifted the massive cruise ship some 30 meters (yards) before ending the day's operations.