These two just disappeared over pyramid lake.
The Boeing RC-135 is a family of large reconnaissance aircraft support theater and national level intelligence consumers with near real-time on-scene collection, analysis and dissemination capabilities.
The RC-135 fleet is permanently based at Offutt Air Force Base, Nebraska and operated by the 55th Wing, using forward operating locations worldwide. The 55th Wing operates 22 platforms in three variants: three RC-135S Cobra Ball, two RC-135U Combat Sent, and 17 RC-135V/W Rivet Joint.
Boeing E-6 Mercury (formerly Hermes) is an airborne command post and communications relay. The E-6B conveys instructions from the National Command Authority to fleet ballistic missile submarines (see communication with submarines), a mission known as TACAMO (“Take Charge And Move Out”).
Boeing B-52 Stratofortress is an American long-range, subsonic, jet-powered strategic bomber and is capable of carrying up to 70,000 pounds of weapons, and has a typical combat range of more than 8,800 miles without aerial refueling.
Some of the cargo or combo flights may be related to current construction. Interesting since the WH says they plan to close it down altogether.