![Security Knowledge Graph - APT Group Profiling and Attribution - NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. Security Knowledge Graph - APT Group Profiling and Attribution - NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks.](https://nsfocusglobal.com/wp-content/uploads/2022/08/0805a.jpg)
Security Knowledge Graph - APT Group Profiling and Attribution - NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks.
![Wondering about the safety of my apt complex. Heat detectors outside every two units, no pulls anywhere : r/firealarms Wondering about the safety of my apt complex. Heat detectors outside every two units, no pulls anywhere : r/firealarms](https://i.redd.it/kgnwclc1ask71.jpg)
Wondering about the safety of my apt complex. Heat detectors outside every two units, no pulls anywhere : r/firealarms
![My apt. Building has one of these by the front door: it's giving a "in unit H/S #139" alarm. What does this mean? : r/firealarms My apt. Building has one of these by the front door: it's giving a "in unit H/S #139" alarm. What does this mean? : r/firealarms](https://preview.redd.it/my-apt-building-has-one-of-these-by-the-front-door-its-v0-osqa9s3rfjkb1.jpg?auto=webp&s=5b347d27429f1e56a64e1571843f146f47028e12)