What's the Kennection? #307

What musical instrument did "Ziggy Stardust" play in his band, according to the David Bowie song of the same name?

In a famous quote from The Godfather, Sonny Corleone announces a gang war by threatening to "go to the" what?

The West Bank sits between Israel and what other country?

In geometry, conic sections are produced by intersecting a cone with what infinite flat surface?

When it first hit the market in 1987, Pert Plus was the first "two-in-one" product to combine shampoo with what?

What's the "Kennection"?