Houthi missile shot down over Saudi Arabia.

The Kingdom of Saudi Arabia entered the Yemen civil war with all its US armaments and its US military impediment. 

Their opponent are the impoverished Houthis.

It is not this one missile was shot down:

http://www.arabnews.com/node/1070541/saudi-arabia.

The question is:
      (i). who are the Houthi's protectors and missile suppliers
      (ii). when do they intend to rain the whole over Mecca?

The better question is:

Do the Saudi now wish they did not 

put their nose into this Yemen civil war?