NASA - NASA's Chandra Observatory Images Gas Flowing Toward Black Hole

NASA - NASA's Chandra Observatory Images Gas Flowing Toward Black Hole: "Different models describing the flow of material onto the black hole make different predictions for how quickly the density of the gas is seen to rise as it approaches the black hole. A more precise determination of the rise in density from future observations should help astronomers rule out some of these models."

A Good Summary of US Pak current relation

The Hindu : Opinion / Op-Ed : Blowing hot, blowing cold, the norm in U.S.-Pakistan relations