What's the Kennection? #218

In 1917, Manfred von Richthofen painted his Albatross biplane a bright new color and soon received what famous nickname?

Other than oxygen, what noble gas is the only chemical element with a letter 'x' in its name?

What's the name of the elderly healer whom Antonio has "bless" him in Rudolfo Anaya's 1972 classic of Mexican-American literature?

The fearsome Philadelphia Flyers' front line of the 1990s led by Eric Lindros was known as the "Legion of" what?

Interstate 84, as it runs between Boise and Portland, mostly follows what historic pioneer route?

What's the "Kennection"?