GMAT
The recent surge in the number of airplane flights has clogged the nation's air-traffic control system, leading to a 55 percent increase in delays at airports and prompting fears among some officials that safety is being compromised.
The recent surge in the number of airplane flights has clogged the nation's air-traffic control system, to lead to a 55 percent increase in delay at airports and prompt fears among some officials that safety is being compromised.
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