Which of the following led to the most sectional strife over slavery in the first half of the 19th century?

richard nixon led the investigation that resulted in alger hiss being convicted of prejury.

valentina tereshkova

soviet cosmonaut valentina tereshkova became the first woman to fly to space when she launched on the vostok 6 mission june 16, 1963. valentina tereshkova was the first woman to go into space. in 1963, she spent almost three days in space and orbited earth 48 times in her space capsule, vostok 6.jan 22, 2018