I think you might be thinking of Obama's revolutionary communist/terrorists friends, Bill Ayers and his wife, co-founder of the Weather Underground, Bernardine Dohrn.
From American Thinker, September 16, 2008
Article: Obama's Foul Weather Friends
By Scott Swett and Roger Canfield
"As a gesture of solidarity, the Vietnamese who [Bernardine] Dohrn met in Budapest presented her with a ring made from an American aircraft shot down over North Vietnam. Bill Ayers would receive a similar ring while meeting with Vietnamese communists in Toronto. He later recalled being so moved by the gesture that he 'left the room to cry.' "
http://www.americanthinker.com/2008/09/obamas_foul_weather_friends.html
______________________________________________
"It was at the Chicago home of [Bill] Ayers and [Bernardine] Dohrn that Obama, then an up-and-coming 'community organizer,' had his political coming out party in 1995. Not content with this rite of passage in Lefty World — where unrepentant terrorists are regarded as progressive luminaries, still working 'only to educate' — both Obamas tended to the relationship with the Ayers."
Article: The Company He Keeps:
Meet Obama’s circle: The same old America-hating Left
http://article.nationalreview.com/?q=YThjYTU1ZDBjNmQ2YzcwNzU1MmYwN2JiMWY0ZGI0NDA=&w=MA==
______________________________________________
From the Chicago Sun Times, November 13, 2008:
Ayers: Obama was 'family friend'
New afterword to 2001 book, Ayers describes Barack Obama as 'family friend'
http://www.suntimes.com/news/politics/obama/1278532,bill-ayers-barack-obama-book-111308.article#