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.
Instead, Boyd, on behalf of the DOJ, renewed a previous request from the FBI director that the department have the opportunity to review the memo in question before any public release. Alternatively, Boyd suggested that Nunes offer the memo to its watchdog, DOJ Inspector General Michael Horowitz. His office would appropriately investigate any alleged wrongdoing by the FBI or other department personnel and independently assess whether prior public release of the memorandum would impair its ability to do so, Boyd said.