How Can a Tractor Beam Pull Objects?

A paper published in the journal Optics Express is grabbing some headlines. It describes a laser beam capable of pulling objects like a tractor beam. We'd love to get your ideas, submit them and vote on them at dailytechnewshow.com. Also, if you see stories about stuff like this and you wanna let us know in case maybe we'd like to talk about it on the show, we're looking for feedback.