(400 – 500 Words) How is the concept of homeland security defined by at least three different authors or organizations/agencies? Does the difference in the definition affect the overall goal to protec


(400 – 500 Words) How is the concept of homeland security defined by at least three different authors or organizations/agencies? Does the difference in the definition affect the overall goal to protect the homeland? How does homeland defense overlap with homeland security?   

Please do bot use direct quotes.