Balloons of the art installation 'Lichtgrenze 2014' ("light border 2014") raise in Berlin Sunday, Nov. 9, 2014. 25 years ago - on Nov. 9, 1989 - the East-German government lifted travel restrictions and thousands of East Berliners had pushed their way past perplexed border guards to celebrate freedom with their brethren in the West. (AP Photo/dpa, Key Nietfeld)

Balloons symbolize fall of Berlin Wall

The citizens of Berlin on Sunday released almost 7,000 balloons into the night sky, many carrying messages of hope to mark the 25th annivers…