Hundreds of U.S. air marshals and federal Bureau of Prisons employees were exposed to dangerous levels of lead while pursuing required firearms proficiencies at gun ranges sanctioned by the federal government, according to an investigation by the Seattle Times.

OSHA has issued 14 notices of unsafe or unhealthful working conditions to the U.S. Department of Homeland Security, Transportation Security Administration, following an inspection at Boston's Logan International Airport. The inspection was begun earlier this year as part of OSHA's Federal Agency Targeting Inspection Program.