A new U.S. clandestine satellite has rocketed into space.
An unmanned Delta IV-Heavy rocket lifted off Friday morning from Cape Canaveral, Florida. It carried a satellite for the National Reconnaissance Office.
The office is keeping quiet about the satellite's purpose.
This was the second rocket launch for the NRO in the last two weeks. An Atlas V rocket carrying another secret satellite was launched June 20.
Friday's launch was delayed a day because of concerns about weather conditions caused by Tropical Storm Debby earlier in the week. The launch was delayed three hours for several technical issues with a sticky valve.