Misc: who called chicago "city of the big shoulders"?

Questions

What do climbers call a peak higher than 914 m (3,000ft)?

Where did the Great fire of London break out in 1666?

Where was the Piper Alpha oil rig belonging to the US Occidental Petroleum Corporation when it exploded in 1988?

One of the worst fires in American history gutted the 26-storey MGM Grand Hotel in the 1980's In which town was the hotel situated?

In the 14th century, a plague killed up to one third of Europe's population What was it called?