包括交通部长肖恩·达菲在内的政府官员表示，关闭空域是因为墨西哥贩毒集团操控的无人机侵犯了美国领空。然而其他知情人士则表示，真正的原因是国土安全部在未与联邦航空管理局协调的情况下，使用了五角大楼的激光系统。
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Its polished surface leads her to believe it got a lot of use and was very dear to someone, she said, adding that interestingly, the ring and dot motif had been found on spinning tools from the much earlier Iron age.
testSort(shellSort, "Shell", arr, N);