“…• Modeling checkpoint operations and supporting infrastructure is well-identified within the R&D realm, in particular, multi-state screening such as adaptive queuing models [45], [64], [65], [66], [67], [68], causal reasoning models [66], [69], [70], [71], human-machine interaction models [72], concealed item detection models [36], baggage screening models [71], passenger flow models [73], risk scoring models [70], attack models [44];…”