[kenny_r]

> Greta visited the US[...]

Yes, to address the United Nations.

[mc32]

...don’t forget the opportunistic appearance before Congress.

[graedus]

I was struggling with your use of "opportunistic". That word typically implies unethical behavior. Is that what you meant?

[mc32]

Had the opportunity to and acted on it. Parent mentioned UN, but she also visited other places in the US like the Congress.

[teddyh]

You probably wanted the word “opportune” instead, then.