Interesting that Obama dug a hole in some secret project back in 2011.
https://www.nytimes.com/2011/10/18/us/big-hole-on-white-house-lawn-prompts-speculation.html
https://www.nydailynews.com/news/politics/white-house-big-dig-wraps-project-remains-shrouded-mystery-article-1.1158343
https://www.nytimes.com/2011/10/18/us/big-hole-on-white-house-lawn-prompts-speculation.html