Here's an updated list of the powder scares and confirmation of what they might be where available. Most of these have not produced definitive published results. They are listed according to date with appropriate links where I could find them. If I missed some, or you know of additional info, let me know.
Nov. 2003
Washington DC - White House - Positive for ricin
http://www.baltimoresun.com/news/health/bal-te.terror04feb04,0,7479227.story?coll=bal-health-headlines Greenville, SC -Positive for ricin
Feb.2, 2004
Washington DC - Capitol Building - Positive for ricin
http://www.ajc.com/news/content/news/0204/03ricin.html NYC -
Brooklyn Rugby Post Office at 726 Utica Ave. in Brooklyn-HOAX
Morgan Processing and Distribution Center on Ninth Avenue near 30th Street in Manhattan - HOAX
Farley Post Office building on Eighth Avenue between 31st and 33rd streets - HOAX
http://www.newsday.com/news/local/newyork/nyc-post0204,0,4671512.story?coll=ny-nynews-headlines Wallingford - HOAX
Health officials wrap up tests of powder found at Wallingford Post Office
http://www.wtnh.com/Global/story.asp?S=1632984&nav=3YeXKegV Bradley International Airport
Philadelphia - HOAX
Bridgeport - HOAX
Feb. 3, 2004
Melbourne, Fl
http://www.local6.com/news/2814297/detail.html Feb. 4, 2004
Sante fe, NM
State Library-hoax
http://www.krqe.com/expanded3.asp?RECORD_KEY%5BLargeHeadline%5D=ID&ID%5BLargeHeadline%5D=3095 San Antonia, TX- Senator Cornyn's office
http://www.woai.com/news/local/story.aspx?content_id=3C9DC7FB-1C6B-4548-A8BA-302C30B3B890 Memphis, TN
Suspicious Powder Found In WREG Lobby-man taken into custody
http://www.wreg.com/Global/story.asp?S=1632274 Rome, Italy-editorial offices of Il Messaggero
http://www.agi.it/english/news.pl?doc=200402041626-1142-RT1-CRO-0-NF11&page=0&id=agionline-eng.oggitalia Feb.5, 2004
Atlanta - Fulton Industrial bulk mail facility
http://www.macon.com/mld/macon/news/local/7883902.htm Hagerstown, MD-Direct Mail processors Incorporated
http://wjz.com/localstories/local_story_036125514.html Huber Hieghts, Ohio Suspicious Powder Closes Local Courthouse
http://www.whiotv.com/news/2825846/detail.html Feb.6, 2004
Windsor Locks
Powder found at airport postal facility
http://www.wtnh.com/Global/story.asp?S=1633276&nav=3YeXKexo Fayetteville, NC
Post Office-not ricin, but no other results given
http://rdu.news14.com/content/headlines/?ArID=42601&SecID=2 Kearny, NJ
Dominic V. Daniels mail processing center
http://www.nj.com/news/jjournal/index.ssf?/base/news-0/1076065831293951.xml Surprise, Az.
White powder in letter shuts Surprise court
http://www.azcentral.com/arizonarepublic/local/articles/0206wvsurppowder06.html Feb. 7, 2004
Beaumont, TX
U.S. Postal Service Remote Encoding Center
http://www.orangeleader.com/articles/2004/02/07/news/news3.txt Feb. 8, 2004
Charlotte, NC
North Lake Park Post Office-"could"have been sawdust-still testing
http://www.news14charlotte.com/content/local_news/?ArID=54116&SecID=2 Feb. 9, 2004
New Cannan, CT-Police headquaters
http://www.news12.com/CT/topstories/article?id=101059 Feb. 10, 2004
Monroe Township, NJ.
Powder Found at Williamstown New Jersey Post Office
http://www.ajc.com/news/content/news/ap/ap_story.html/National/AP.V0108.AP-Post-Office-Eva.html Moscow-BP headquarters
Suspicious Mail Tested at BP's Moscow HQ
http://story.news.yahoo.com/news?tmpl=story&cid=518&ncid=732&e=4&u=/ap/20040210/ap_on_re_eu/russia_bp Clarke County, Va
Suspicious Powder Sent to Project HOPE
http://www.winchesterstar.com/TheWinchesterStar/040210/Area_HOpe.aspThanks for keeping track of all that.