When treated as a singular keyword term or the subject of an article, the entire phrase functions as a proper noun. It acts as the specific name for the historical utterance and the concept of civilian resistance it represents in the context of the United Airlines Flight 93 hijacking. In this capacity, it can serve as the subject or object within a sentence, allowing it to be the central focus of analysis.
A detailed grammatical analysis reveals the phrase is a composite of two distinct units. The first part, "September 11th," is a noun phrase specifying a date, acting as an adjectival or adverbial modifier that sets the temporal and historical context. The second part, "Let's roll," is a hortative or imperative verbal phrase. It is a first-person plural imperative construction, derived from "let us roll," which functions as a call to action or a command to begin an undertaking.
For the purpose of structuring an article, recognizing the phrase's function as a proper noun is critical. This classification allows the writer to treat the entire slogan as a single, unified concepta symbol of defiance and heroism. Its nominal function means it can be defined, discussed, and analyzed as a singular thematic element, making it a cohesive and powerful main point for the article, rather than a fragmented grammatical construction.
