apollo 11 quote

[Half Hollow Hills High School West <dicicco@TRANSIT.NYSER.NET>]

OK, colleagues, here's a reference question for you from one of my
teacher/authors: On the Apollo 11 Moon plaque there is the inscription,
 
Here, men from the planet, Earth, first set foot on the Moon.
 
         Armstrong            Aldrin           Collins
                        Richard M. Nixon
 
             We came in peace, For all Mankind.
 
Question 1: Is above one or two quotations?
Question 2 (and more importantly): Who wrote above quotation(s)?
 
TIA!
Ralph DiCicco, Library Media Specialist
Half Hollow Hills HS West
Dix Hills, NY 11746