Nice ...
I want my own lidar

What is money?
Why does money have value?

Interesting questions..

http://sacred-economics.com/sacred-economics-chapter-3-money-and-the-mind/

http://www.wolframalpha.com/input/?i=Honduras+time

http://www.youtube.com/v/3v67pxeizXo?version=3&amp

Perfect!

Now this is interesting.

http://www.space.com/17628-warp-drive-possible-interstellar-spaceflight.html

A v S fight

M will laugh

http://www.youtube.com/watch?v=p3Z8tjlQpD4

Zhang Xin interview

http://www.charlierose.com/view/interview/11799

Draftsight is very good 2D CAD, but pdf import is missing.
http://linuxaideddesign.blogspot.cz/2011/08/how-to-work-with-pdf-files-with-ares.html

You can try

Bricscad .. pdf underlays
http://www.bricsys.com/en_INTL/bricscad/features.jsp

progecad ... pdf import
http://www.progesoft.com/en/products/progecad-professional/features

[flash=400,250:eb984pqv]http://www.youtube.com/v/0V_CCzZtVH8?version=3&amp[/flash:eb984pqv]

Vectorworks .. pdf import
http://www.novedge.com/products/1467/tab/1

[flash=400,250:eb984pqv]http://www.youtube.com/v/93ABuH9xvfo?version=3&amp[/flash:eb984pqv]