blood clots. as secretary of state mrs. clinton has logged hundreds of thousands of miles. for now she remains grounded. >> thank you very much for the update. rick: let's take a look now at some of the risk factors surrounding the blood clots. they usually occur after an injury or because of a heart problem. clots can break off and travel to other parts of the body and they are most dangerous when they travel to the lungs causing a potentially life-threatening situation or to the brain where they can actually lead to a stroke. finally sometimes a blood thinner is prescribed to help dissolve the clot over time. coming up later in our show our doctor joins us with more on the secretary's condition and per prognosis for the near future. >> reporter: we are waiting to hear from president obama. also coming up new fallout from the tragedy in newtown, connecticut as a major sporting goods chain faces a possible class action lawsuit, that is for refusing to deliver the guns some customers already paid for. is the company in the wrong