The radical history of the bikini

With summer upon us, it's worth reflecting on one of beachgoers' favourite items. The bikini may be small, but it has a fairly large and radical history dating back to the anti-nuclear movement in the 1940s. And deciding to put it on today, for some, can still be radical, too. Angela Barnett, a writer and body-positivity campaigner based in Auckland, tells Mark Leishman about what she calls "a protest in three small triangles".