Which would be considered a secondary source about the assassination of abraham lincoln

Because of the conflict in the persian gulf and several attacks by iran on the u.s. fleet in the gulf, war is declared on iran. which congressional power is involved?

Which explorer travel the farthest south in his journey

What is the order from these fractions of least to greatest 1.64 1 and 7/8 0.070 9/5 pls due tomorrow