[JURIST] US Homeland Security Secretary Michael Chertoff announced in a press release late Friday that the threat level for transit systems nationwide was being lowered from Code Orange, or "high", to "elevated" Code Yellow. The threat level had been increased on July 7 following the London subway bombings [JURIST news archive]. In his statement, Chertoff urged all Americans to "continue to be vigilant, take notice of their surroundings, and report suspicions items or activities to local authorities immediately". The Washington Post has more.