You were just mentioning Las Vegas - I think it has been and still is high on the list:
AP: U.S. didn't warn Las Vegas of threats
8/9/2004, 5:28 p.m. ET
By JOHN SOLOMON
The Associated Press
WASHINGTON (AP) — A year after the Sept. 11 attacks, the Justice Department obtained video surveillance tapes suggesting terrorists were targeting Las Vegas casinos but authorities never alerted the public as they discussed whether a warning might hurt tourism or increase the casinos' legal liability, internal memos show.....
http://www.nj.com/newsflash/war/index.ssf?/base/national-29/1092087266281540.xml&storylist=njterror
The Mohammed Atta Brigades? That's one I haven't heard before.
El Salvador Tightens Security After Iraq Threats
Aug. 9, 2004 — SAN SALVADOR (Reuters) - El Salvador stepped up national security measures on Monday after a group claiming ties to al Qaeda threatened to attack the Central American country unless it pulls its troops out of Iraq.
The group, which calls itself Mohammed Atta Brigades - al Qaeda of Jihad, has vowed to strike inside El Salvador if the tiny nation does not cancel its plans to send a new contingent of soldiers to Iraq this month.....
http://abcnews.go.com/wire/World/reuters20040809_421.html