Hard drive icon disappeared, how to get it back?

Somehow my HD icon disappeared as well as my Applications folder icon on my desktop. How do I get icons back there. I tried moving it from a menu in finder but it had the symbol as if you are removing something from the dock and didn't move it. Anyone know?

i had the same problem, open up Terminal and type: sudo chflags nohidden /

that should at least temporarily fix your problem, after you input that it will want your password, just type it in (it won't show the password being typed in) and press enter and that should fix your problem.