See at 0:39 of the video. Tarrant's family says "its only since he's traveled overseas. I think, that that boy has changed. completely to the boy we knew"

https://www.heraldsun.com.au/news/world/grbrenton-tarrant-family-response319/video/7c4676ee025e3d538aecdfb7869a2227

1775.png <- birth year of US Navy

Look at the buoys.

Look at the strip of land in the background.

Q, who went to gitmo today?

https://commons.wikimedia.org/wiki/File:USS_Underwood_arrived_in_Guantanamo_Bay_120718-N-NL541-054.jpg