Question:
Which employer did Roger D. Launius work for in Jun, 2015?

Context:
 Roger D. Launius works for United States Air Force from Jan, 1982 to Jan, 1990. 
 Roger D. Launius works for Smithsonian Institution from Jan, 2002 to Jan, 2017. 
 Roger D. Launius works for NASA from Jan, 1990 to Jan, 2002.

Answer:
Smithsonian Institution