August 15 1961 / UPI Telephoto / BERLIN. Two young girls roller skate on empty East Berlin street behind barbed wire barricade near the border of the American sector. As the East Germans tightened their stranglehold on East Berlin, scores of anti-communists were reported arrested. The flow of refugees, which had run as high as 2,000 in a single day last week before the border closing, was trimmed 8/15 to about 50 who eluded the border guards. berlinwall