MINNEAPOLIS — Tracing crime guns could give police an investigative lead. The system is outdated. Some have called it archaic. Federal law prevents it from being updated. There's a conversation ...

Please provide your email address to receive an email when new articles are posted on . The Bluetooth-based system predicted close contacts with an accuracy between 0.88 and 1. The system also ...

The United States is developing a "new system for international travel" that will include contact tracing for when it eventually lifts travel restrictions that bar much of the world's population from ...