Federal investigators haven't named a cause of the derailment, but they and other officials familiar with the investigation said the probe was focused on a broken rail joint found in the wreckage after the accident.

WSJ: Metro-North Is Set To Restore Full Service Wednesday

Djourou was of the opinion that there were no broken bones or torn ligaments in his damaged joint, but Arsenal moved to clarify the situation on Tuesday afternoon following further tests and the Swiss FA amended their story.

BBC: Arsenal insist Johan Djourou will miss rest of season

The Brooklyn resident checked into New York's Hospital for Joint Diseases in January 2004 for routine surgery to repair a broken shoulder.

FORBES: Germ Warfare

When Fine Gael and Labour agreed to work as coalition partners, they issued a joint document saying voters had chosen parties "to begin mending the pieces of a fractured society, a broken economy".

BBC: Ireland country profile

The painful attack usually occurs in only one joint at a time and can be confused with extremely painful tendinitis, a very bad sprain, or a broken bone, even in someone with a history of diagnosed gout.

CNN: Do I have gout or tendinitis?