USAF Thunderbirds spotted testing red and blue colors over Pensacola (photo via Jake Warye instagram). The squadron tested color smoke back in 1964 when they flew F-105B Thunderchiefs, but after a crash and only six air shows, they switch to F-100D and so abandoned color smoke.
Probably the both US demonstration squadrons will use color smoke to paint the national flag colors in the skies over the major cities.
Thunderbirds are on the visit and joint training flights at Blue Angels’ home base NAS Pensacola. They prepared for upcoming flyovers around the USA to support the healthcare workers fighting with COVID-19 pandemic.
On Apr 22, President Trump confirms Blue Angels and Thunderbirds flyovers announcing the mission “Operation America Strong”. “Operation America Strong was the idea of our great military men and women. The Thunderbirds and Blue Angel crews wanted to show support to our health care workers in the time of war are racing toward the fight. I want to see those shows. I want to see those shows.” - Trump said. Of course, those shows will be only flyovers, but this probably is the Trump interpretation.
The other main goal for these flyovers is to rise the spirit of American citizens in times of pandemic.
You can check the preliminary flyovers schedule on this page: