What Christmas tradition started in Barcelona involves swimmers plunging into freezing water on Christmas Day?

Christmas Swim (Copa Nadal)

Who said, "If I perish, I perish" before approaching the king uninvited? Who portrayed comic book villain Harley Quinn starting in the 2016 film "Suicide Squad"? In "Saving Private Ryan," which actor portrays Captain John Miller? What do you call the act of running between wickets in cricket? Who was famously known as the vocalist of 1980s pop-rock band Culture Club?