help insect ID

[Sfordphoto]

not my picture, so i hope the person doesnt mind me posting it here
not sure what either of them are
http://farm4.static.flickr.com/3005/2716916894_1def923d7e_b.jpg

[orionmystery]

I think it's a robber fly.

[racketman]

Robber fly eating a Bark fly.