请教各位NIW 高手：
本人专业是数据挖掘，信息科学中的工具学科。
曾经从事过的研究和项目(应用领域）有
计算机安全，生物特征识别，商务智能，客户关系管理等。
请问，在陈述Nat'l Interest时，那些应用领域会更attractive.
My delimma is, although (homeland) security has been a ciritcal issue in the states, esp. after 9/11, few insitutes, including dept.of homeland security, would employ non-US citizenship to their projects.
While Business Intelligence, CRM is common, and is hard to appeal NATIONAL INTEREST.
Shall I prepare more, by furthering & extending my research to some HOT TOPIC, such as Bio-, Security- related applications?
Thank you !