Select all that apply. Tragically, the United States lost astronauts in accidents involving:

a. Viking 11
b. Vostok 1
c. Challenger
d. Apollo 11
e. Columbia

Plz which of the following statements is the best definition of a blockade? a. a blockade is a group of soldiers recruited from a foreign country who serve for the money. b. a block it is a military tactic in which one army moves into place to face another army. c. a blockade is a wooden fence built to defend a colonial settlement. d. blockage is the shutting off of a port by ships to keep people or supplies from moving in or out.