Q: Would a German Shepherd be welcome in an airport?
A: Airports in the US must be compliant with the ADA allowing for service dogs as medical equipment. Police security often use dogs like German Shepherds to search for drugs at airports. Some airlines have special travel accommodations for dogs.
The answer is yes.

Q: Does United Airlines have a perfect operation record?
A: An airline with a perfect operation record has no crashes or other damaging incidents. United Airlines has had over 30 crash incidents over several decades.
The answer is no.

Q: Has Ivan the Terrible flown to Europe?
A: Ivan the Terrible was the 1st Tsar of Russia. Ivan the Terrible died in 1584. The first confirmed person to fly was Jean Francois Pilatre de Rozier in 1783.
The answer is no.

Q: Was song of Roland protagonist friendly with group that had sagas?
A:
The sagas were Nordic mythological stories that were celebrated by the Vikings. The Song of Roland was an epic poem about the nephew of Charlemagne. Charlemagne was King of the Franks. The Franks fought many battles against Vikings including the Siege of Paris in 845 AD.
The answer is no.