-1. What is a pangram?
-2. The hilly area on the Israel/Syria border, scene of several bitter Arab-Israeli conflicts in the 60s/70s, is known as what?
-3. In what type of engine is the fuel ignited by compression?
-4. What is the last letter of the Greek alphabet?
-5. At which two stadiums did the 1985 Live Aid concert take place simultaneously?
-6. What is the name of a one-sided closed surface formulated by a German scientist whose name it now bears?
-7. Who led the American forces who defeated the British at the Battle of New Orleans in 1815...?
-8. ...and who had a top 10 hit with "The Battle of New Orleans" in 1959? (Two acceptable answers)
-9. The characters Pamina and Papageno appear in which Mozart opera?
-10. What are the Bq, Gy and Sv units of?
-11. What was the surname of Julius and Ethel, the married couple executed for espionage in Sing Sing prison in 1953?
-12. Who is this...?
-12a. ...and for a bonus cigar, where was the photo taken?

7. General (?) Jackson.

[But the cheek of it. Beating the British !! ]

I know Mad - not a thing we're at all used to!

9. The Magic Flute (a favorite of mine)

How did I guess you'd go for that one, Lady K?

2. The Golan Heights (strange the things you remember)

Bernie

10. radiaton - I think strength and/or absorption

Two good ones!

Know what you mean, Bernie!

You have a scientific background, michele ? It seems to be your forte

11. Rosenberg

6. Moebius Strip

12. Art Garfunkel? ( kind of standing like him)

ETA: If so, I know where that is at

Marian -

manxman - I also had "Klein bottle" - are they the same?

Good spot, jb! If 12a hasn't gone by tomorrow, go for it

Guilty as charged, Rog!

Hi UW. Relationships exist between Klein bottles and Mobius strips, but they are not the same. Both are one-sided surfaces; that is, their "inside" is the same as their "outside". However, a Mobius strip has a boundary, whereas a Klein bottle does not. (One may construct a Klein bottle model by appropriately gluing together each boundary of two Mobius strips.)

I'm not sure it's valid to describe a Mobius strip as a closed surface because it has an edge (although the edge itself forms a closed curve). Hence, I would venture to say that 'Klein bottle' is a closer match to the given clue.

I'd also like to note that, for mathematicians, neither of these two surfaces actually exist in reality. There is no such thing as a 2-dimensional surface in our universe; the concept exists only in our mind because all physical surfaces have some thickness. Therefore, the Mobius strips that we construct with materials like paper are not true Mobius strips. They are simply 3D representations of a 2D idea. Likewise, a Klein bottle made of glass is a 3D model of a 4D definition (because, mathematically, the surface has to pass through itself without making a hole).

To manxman's credit, both Felix Klein and August Mobius were German mathematicians.

TYVM, Helmer!

5. Wembley in London and somehwere in the USA (but I can't remember where)

I do remember I stayed up right through the night recording the whole thing on VHS tapes!

I think it was Philadelphia, flotsam, but I don't remember the name of the stadium ....

(I will understand if this "half an answer" isn't allowed.)

I'm all heart folks - it was JFK Stadium Philadelphia

12a. Central Park, New York City

8. Johnny Horton

4. Omega

3. diesel

Great selection, all spot-on.

Sky Arts re-ran that concert a couple of weeks back jb, and I thought at the time he had a very distinctive stance

And Lonnie Denegan in the UK, Joan

1. A pangram is a sentence that has all the letters of the alphabet at least once.

Nice finish, Lady K!