G20 flag with 5-pointed star

Factual Questions
1

So if you watch the daily show from Sep 28 (available for free at www.thedailyshow.com), and watch the segment called “Pittsburgh Irates”, a few seconds in, you see Obama walking left to right past flags. There’s:
US
Argentina
Australia
Brazil
Canada
China
???

It looks like a German flag, kinda, but with a 5-pointed star in yellow on a green circle in the middle. What is it?
The G20 countries are:
Argentina
Australia
Brazil
Canada
People’s Republic of China
France
Germany
India
Indonesia
Italy
Japan
Mexico
Netherlands
South Korea
Russia
South Africa
Spain
Turkey
United Kingdom
United States

2

Answer: It’s the flag of Ethiopia. So what is it doing at the G20?

3

The Ethiopian Prime Minister was invited to attend by the hosting Prime Minister, Gordon Brown. I believe the intent was to give a voice to Africa during the summit, but, according to my googling, not everyone is happy with the choice of his particular voice.

4

See the next-to-last paragraph here: How to host a G20 summit | The World from PRX