No prob. I totally agree. It is tough to judge size when you're a long ways away. You'll really be able to tell the difference if you ever get an opportunity to tour them.
I've toured one at an air show about 20 yrs ago with my daughter and i agree it is humongus !! I remember they told us how much cargo with army vehicles it could take at one time or it could carry 3 of the largest army tanks made all at the same time but i have never toured a C17 . I'm checking throught some old CDs' to see if i have any shots left of a C17 i took at our local airport back a yr or 2 ago . Saw it from a distance of about a little over 1/4 mile from the highway . It was about 10 yrs ago when i saw them both here at our local airport but i didn't have a camera at the time so i have nothing to show and tell for that event . But if i haven't deleted them i have picts of both a C5 and a C17 i've taken since then .