Large amount of yellowish orange lights moving across the skyMy son and I were driving on Houksville rd, toward Carrollton Rd about 9:55 pm, in Hampstead Md. We were .9 of a mile from Carrollton Rd. He said "mom, what is that?" I looked to my right and saw 20-30 orangish-yellow balls of light moving up into the sky. They were moving slowly up and then horizontally. We stopped and watched for about 3 minutes. We then drove to Carrollton Rd. and turned left and watched from there. They seemed to continue to move forward and up. They seemed to dissapear as they went higher. We could not tell how far away they were. But they did appear to move with purpose. We had the windows open did not hear any sound at all.