Conversation so far:
Where was their international breakthrough?
Kraftwerk went on a multi-date tour to promote the Autobahn album, a tour which took them to the US, Canada and the UK for the first time.
Was there any successful singles from autobahn?
The radio edit of the title track became a surprise international hit, reaching number 11 in the UK and number 25 on the US Billboard Hot 100 chart.

Question: Was radioactivity an album that they produced?
Self-contained rewrite: Was radioactivity an album that Kraftwerk produced?