Highly Contagious Strand of Bird Flu Created in Laboratory — Weapon or Research?

The story is that scientists were making a new strain of highly-contagious bird flu as an experiment to help them get ready for when such a strain develops on its own.  However, the United States has now requested that they stop releasing any information about it in the name of global security.  This has people asking questions, wondering what would happen if this strain was stolen by terrorists?  Or could it be used in the future as  biological weapon?