Interest in homeland security proliferated after the 9 / 11 attacks , but efforts to increase awareness in the field were underway long before , says william kelley , a researcher working with the office for domestic preparedness in the federal government ' s department of homeland security 联邦政府国土安全部国内应急办公室的研究人员威廉?凯利说，在911事件后，人们对国土安全的兴趣急剧增加，但加强这方面意识的努力很早以前就开始了。
Killer whales may be the top of the food chain underwater , but they stand little chance against the eco - tourists who try to catch a glimpse of the majestic mammals rising above the water line . " we now have more whale - watch boats than there are whales , " said kelley balcomb - bartok of the orca conservancy , a nonprofit organization in washington state that works with scientists to protect orcas 尽管逆戟鲸也叫杀人鲸，是一种小型的食肉鲸鱼，性情凶猛可能是海底世界的霸主，处于食物链的最高一级，然而面对那些想要一睹这种庞大的哺乳动物从海岸线浮出海面的壮观景象的观鲸者，它们显得那么不堪一击。
