Physical security is the first line of defense at an airport and for airport infrastructure such as off-airport communications and lighting towers. Physical security includes alarms, access control, lighting, cameras, and barriers.
Based on the readings (LINKS BELOW) and any research you conducted, discuss the use of two security sensors in the aviation environment.
Reference and cite your sources using the current APA format. Make your initial post as early in the week as possible so that others have time to reply.
**READINGS**
Physical security is the first line of defense at an airport. It is part of the layered or protection in-depth concept. Physical security includes alarms, access control, lighting, cameras, and barriers. 
Explore these topics in-depth by reading from the following: 

Practical Aviation Security: Predicting and Preventing Future Threats/ERAU Hunt Library – Ebook CentralLinks to an external site.

Chapter 6: Introduction to Screening
Chapter 7: The Screening Process

General Aviation Security: Aircraft, Hangars, Fixed-Base Operations, Flight Schools, and Airports/ERAU Hunt Library – Ebook CentralLinks to an external site.

Chapter 3: Physical Security for the Aviation Environment