The homeland security and emergency management market size is projected to grow from an estimated USD 557.14 Billion in 2018 to USD 742.06 Billion by 2023, at a CAGR of 5.90% from 2018 to 2023.  Increasing terrorist threats and biohazard attacks and occurrence of unpredictable natural disasters due to ever-changing climatic conditions worldwide are key factors driving the growth of the homeland security and emergency management market size