The worldwide rate of baggage mishandling reported by SITA $($Soci$$t$$ Internationale de T$$l$$communications A$$ronautiques$)$ in $2017$ was $5\mathrm{.}73$ per $1,000$ passengers. If the average number of checked bags per passenger is assumed to be $1\mathrm{.}3,$ how many errors per million opportunities does this represent? How does it compare with the rate for Nighthawk$-$better or worse?