[Berlin_Freeper]

Last month, the Finnish navy chased an "underwater object" believed to be a submarine. It dropped depth charges to warn the intruder it had been detected

Submarines from
Germany,
Norway,
Sweden
and the United States

are taking part along with 13 surface ships from
Canada,
France,
Germany,
the Netherlands,
Norway,
Poland,
Spain,
Turkey,
the United Kingdom,
and the United States.

[McGruff]

This year's annual exercise...

So it was already scheduled?