The correct answer is Walking over land bridges, i took the test.
Without suffering of.....
Secondary Sources
Speech by Martin Luther King against the Vietnam War
http://www.americanrhetoric.com/speeches/mlkatimetobreaksilence.htm
Website for Special Operations, Navy SEALS
http://www.specialoperations.com
Abbreviated Timeline
http://www.english.uiuc.edu/maps/vietnam/timeline.htm