Emirates flight EK222 had to divert and make an emergency landing in Warsaw, Poland, on May 20.
The A380 plane, en-route from Dallas to Dubai, was diverted after a Nigerian passenger suffered a stroke midair.
According to an airline spokesperson, “Emirates flight EK222 from Dallas to Dubai on 20 May was diverted to Warsaw due to a passenger medical emergency… Subsequently, the aircraft faced a technical issue on ground. Passengers and crew safely disembarked, and Emirates arranged a replacement aircraft to bring all passengers to Dubai, with a total delay of 6 hours. Emirates apologises for any inconvenience. The safety of our passengers and crew is of paramount importance.”

Vueling Airlines flight VY-8318 had to return and make an emergency landing in Amsterdam, Netherlands, on September 15th.
A small plane crash-landed in a field near Williford Road in Sharpsburg, Wilson County, North Carolina, on the afternoon of March 10th.
CityJet flight WX-118 had to return and make an emergency landing at Dublin Airport, Dublin, Ireland, on March 18.