The likelihood of an attack by international terrorists was downgraded to "substantial", while the threat level from Northern Ireland terrorism within the province continued to be classified "severe".
Hong Kong authorities say the security threat level for the Olympics in the city is moderate.
Application of fuzzy pattern recognition for submarine threat level estimation
Subject: re: Morning news digest: Former Bush homeland security chief admits to White House pressure over threat level.
By the use of fuzzy optimization theory and hierarchy analysis process, multiple targets detected by airborne fire control system are sorted according to their threat level.
US has reduced the threat level on inbound flights from Britain from red to orange meaning a few more items are acceptable in carry-on.
