The director of materials processing at NASA's Jet Propulsion Laboratory joined a growing list of US scientists who had recently gone missing or died.
That list is made up of at least 12 US scientists, who supposedly all had access to sensitive government research.
"These deaths and disappearances may represent a grave threat to US national security and to US personnel with access to scientific secrets," the letter said.
When asked about the missing scientists, White House press secretary Karoline Leavitt said: "No stone will be [left] unturned in this effort.
The FBI said in a statement it was "spearheading the effort to look for connections into the missing and deceased scientists".
NASA also confirmed it was "coordinating and cooperating with the relevant agencies in relation to the missing scientists".
"At this time, nothing related to NASA indicates a national security threat," NASA spokesperson Bethany Stevens said. »
![image for [OC] tail section of a Royal Canadian Air Force Dakota that crashed in the Rockies in 1946](97777f8a-2e2a-5e1b-9133-b2932c9b42e9_thumb.jpg)
