An American and a German astronaut spent just over six hours on a spacewalk outside the International Space Station for equipment repairs and maintenance.
Twitter sued the US government, claiming its free speech rights are being violated by restrictions on its ability to disclose numbers of secret orders.
Barack Obama said the chances of a US Ebola outbreak were "extraordinarily low" but vowed to press world leaders to step up the global fight against the epidemic.
US health officials said that a doctor who returned to a hospital after being treated for the Ebola virus did not have a new case of the infectious disease.
HP is poised to become the latest technology firm to split into two entities by separating its computer and printer businesses from its corporate hardware.
Turkish Prime Minister said no one has the right to criticise Ankara on Syria, after US Vice President accused Turkey of financing and even arming jihadists.