Helicopters investigate red lights hovering over everett, and snohomish WAStanding on my front porch, looking east a formation of red lights, three of them, formed a line over as though they were moving together. It was the shape of a saucer and it hovered and blinked as more red lights showed up in the sky just a short distance away. As we were watching multiple white lights in triangle formation popped up out of nowhere. They hovered as the sounds of thunder echoed through the sky yet there were no clouds no lightening, the booming sounds continued for ten minutes consecutively every 30 seconds. There were no flashes in the sky until the sounds were done then randomly they started to light up the sky. As the sounds stopped the lights continued to flash in a pattern and we could hear helicopters and see their flashing lights as they seemed to investigate the red lights. After all this in the dense wooded area one of the red lights landed on the ground and pulsated for some time until disappearing.