What is the: Who, what, where, when, why, and the short and long term causes of the transcontinental railroad

Answer 1

http://anar-manifestdestiny.blogspot.com/2007/11/transcontinental-railroad-shaping.html

http://www.ehow.com/info_8509845_were-causes-transcontinental-railroad.html

http://www.digitalhistory.uh.edu/disp_textbook.cfm?smtID=2&psid=3147

http://www.shmoop.com/transcontinental-railroad/summary.html

http://en.wikipedia.org/wiki/Transcontinental_railroad