While solar water heater devices have been around for over 100 years, the last 20 years have seen significant advances in absorber coating technologies, resulting in solar collectors that can reliably convert >50% of available sunlight for domestic hot water supply.
In a cover letter accompanying the Friday delivery of the 384 pages of new text messages, Assistant Attorney General Stephen Boyd explained that technical issues with the FBI's retention software prevented the bureau from capturing messages sent between the two employees on their agency-issued phones from December 14, 2016 to May 17, 2017.
Robert Mueller. Robert Swan Mueller III /ËmÊlÉr/ (born August 7, 1944) is an American lawyer and civil servant who was the sixth Director of the Federal Bureau of Investigation, serving from 2001 to 2013. He is currently head of the Special Counsel investigation of Russian interference in the 2016 United States elections.