Amateur ("ham") radio operators and emergency management personnel are participating in a nationwide 24-hour emergency communications exercise this weekend.
The annual "Field Day," held each June, allows operators to demonstrate and test an array of communication systems and technologies.
The public is invited to join Lake County RACES volunteers from 8 a.m.-noon Sunday on the Lake County government campus in Libertyville to learn more about amateur radio and emergency communications.
There will be demonstrations and opportunities for visitors to get on the air, making voice contact with other amateur stations across the country.
The county campus is on the north side of Winchester Road, just west of Milwaukee Avenue in Libertyville.