What did Katie say her mother's name was?
'Rokhle', which is just the Yiddish pronunciation (and essentially the Hebrew pronunciation) of Rachel.
Why does JJ keep referring to Katie as K-K-K-Katie?
"K-K-K-Katy" refers to a song published in 1918 by Canadian-American composer Geoffrey O'Hara and popularized during the aftermath of World War I [1914-1918]. The song tells the story of a young soldier who stutters when trying to speak to girls. The song's chorus is as follows:K-K-K-Katy, beautiful Katy,
You're the only g-g-g-girl that I adore;
When the m-m-m-moon shines,
Over the c-c-c-cowshed,
I'll be waiting at the k-k-k-kitchen door.
The House Un-American Activities Committee (HUAC) was an investigative committee of the U.S. House of Representatives originally created in 1938 to investigate alleged disloyalty and subversive activities of anyone suspected of having Nazi ties. After the end of WWII and rise of the Cold War, the committee's focus changed to the activities of suspected Communists.