From: alexander koryagin <koryagin@newmail.ru>

In the article "The lasting allure of the flying saucer",
by Jon Kelly, BBC News Magazine, I've read this passage:

http://www.bbc.com/news/magazine-27796697
-----Beginning of the citation-----
Thus flying saucers became a somewhat kitsch symbol of the more
whimsical end of the space age.

But the notion of floating disc-shaped aircraft wasn't considered
fanciful by governments and militaries around the world. The new LDSD is
far from the first attempt by earthlings to construct a flying saucer-
like aircraft.

For instance, German engineer Georg Klein told the CIA he worked on a
Nazi flying saucer for the Luftwaffe under designers Rudolf Schriever
and Richard Miethe - a claim which prompted the Americans to study the
possibility of creating one of their own.
-----The end of the citation-----

1. in the second paragraph: "But the notion of floating disc-shaped 
aircraft wasn't considered fanciful by governments and militaries around 
the world."

Why the author has not put "a" before "floating disc-shaped aircraft"?

2. in the third paragraph: Why not _a_ German engineer Georg Klein?
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