Why has the u. s. government become increasingly concerned about terrorism?

The last thirty years has shown the globe the power of non-state actors using "terrorism" as a means to achieve political or social goals. For the United States, the bombings of the embassy in Beirut, the bombing of the USS Cole, and 9/11 has driven home the changing nature of warfare and the need to examine the root causes of terrorism, although the US has yet to achieve success in this arena.

a photo collage of women at work during world war 2

if you have to make a general question and respond to your thoughts, then this isn't really a question someone can you on. read the passage, form your question, and answer using your thoughts. no one else can understand how you interpreted this text if you don't tell us.