One Bloomberg letter was opened by screeners at the City Hall mail facility a few blocks from the building on Gold Street, in Lower Manhattan. Bloomberg's aides said the episode proves the counter-terror measures in place at City Hall worked because no unscreened or suspicious mail gets to the mayor, his staff or anyone else who works in the building – including the press corps.
The second letter was sent to Mark Glaze, director of the Bloomberg-led Mayors Against Illegal Guns in Northwest Washington, near the White House. Glaze actually opened the letter himself on a park bench and then called for help after seeing the powder in the envelope, a source told ABC News. He declined to comment tonight.
A D.C. police report obtained by ABC News said Glaze found the envelope to contain "a threatening message which had a whitish orange substance on the note…The letter was addressed to [Glaze] but there was no return address or sender's name."