What does strong, willing sinews in your wings mean ? in the poem to america by james weldon

There are only two stanzas to this Poem (To America). The author's name, by the way, is James Weldon Johnson.

The second stanza contains the line you are asking about. This stanza is built on contrasts. You have to read the next line to get the meaning of the one you quoted. The next line is

Or tightening chains about your feet?

So you have a contrast. Would you rather have an eagle with strong willing wings representing willingness to bring about strong freedom

or

do you want a people that are chained and held to the ground?

Remember that James Weldon Johnson was colored. America meant a great deal to him, but his poetry is filled the imagery of the era of slavery.

I'm looking at the word chains when I say that.

So America, the choice is yours. You can have a strong nation whose wings are made of strong sinew or you can have a chained and slave state. Which will it be?

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)