There is probably a much more elegant way of accomplishing this, but I was able to get into the UA section by conducting a search.

I entered "e" as the search word, chose "Match any of the search terms above" as an option, restricted the forum to United, selected "Search in subject only" and Search by Date "Since yesterday.

I figured most English sentences contain at least one vowel and "e" would be a good place to start. Too bad the search mechanism doesn't permit wildcards.