Step 1: Strand 3 Personalities

 The mother of the 'frequency-hopping' system
and Wi-Fi

English mathematician, logician
and cryptographer

American voting and women's rights activist and a leader in the civil rights movement

American gay civil rights activist from the 1960s

WWII spy, resistance fighter, and CIA agent

An Irish nun, the French resistance, the Gestapo and Nazi death camps

Known as the 'Scarlet Pimpernel of the Vatican'

Known as the 'Hyena of Auschwitz'

Renaissance patron and one of the first black leaders in Europe when he became
the Duke of Florence 

An African-American inventor of the early version of a gas mask and mechanical traffic signals