Based on your current knowledge and understanding of DHS, what do you think would be an effective infiltration into the United States by air? A destructive biological attack and use of a contagious agent to cause massive panic and health challenges within the population, an airliner hijack , exploitation of the United States’ student visa g program, airline terrorists enter the United States at various major city locations, DC, NYC, LAX, BOS, MIA, etc., or missile attack? Remember to support your statements with examples and references.