Misc: Which eighties fashion accessory consisted of a saftey pin and small beads?

Questions

What was the name of the first US atomic submarine?

In what year was the US atomic submarine Nautilus launched?

What completed a journey of 19,500 miles with only three stops in August 1929?

What was the name of the first 'talking movie'?

In what year was the first talking movie 'The Jazz Singer' released?