What about the time that John Kerry went to NZ to visit John Key?
https://www.stuff.co.nz/national/politics/86402437/us-secretary-of-state-john-kerry-meets-with-john-key-in-wellington-with-the-future-of-tppa-is-on-the-line
https://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=11747160
Suprise visit the day before and then off to Antarctica?
https://www.dailymail.co.uk/news/article-3926178/John-Kerry-lands-Antarctica-highest-US-official-visit.html