WATCH: How many politicians does it take to plant a tree?
Taoiseach Enda Kenny plants memorial tree on Capitol Hill
How many politicians does it take to plant a tree?
A slight slant on the age-old question - but it's one we want to find out.
It's a rare honour to plant a tree on Capitol Hill. Only about five such trees are planted every 100 years and for a foreign dignitary to do so is even more rare.
The last similar event was a memorial tree planted in 2014 to honour Anne Frank.
So the crew of Irish present were sure to share out the duties.
Taoiseach Enda Kenny coordinates the efforts, while at different stages Sean Haughey TD, Eamon O Cuiv TD and Senator Mark Daly take part. Former Minister Jimmy Deenihan and a number of U.S. senators also lean in to help out.
Mr Kenny's presence in Washington was largely brought about by Fianna Fáil senator Mark Daly, who has been working with congressmen Mick Mulvaney and Brendan Boyle to get permission for the ceremony.
The Taoiseach also visited an exhibition of documents related to 1916 in the US National Library. It included items such as a letter from Roger Casement's sister to President Woodrow Wilson asking him to help in her brother's case.