iphoto help

Hi guys,

I recently purchased a new macbook air and have been slowy trying to get the hang of it. I have a question regarding iphoto. I'm trying to add a photo from the internet to iphoto; prior to I was able to click the photo and drag it to iphoto and it was imported. I'm trying to do that now and it doesn't seem to be working. Is there any reason why it stop working cause now when i click and drag a photo towards iphoto it doesn't import anymore