The crux of the speech was reducing the threat of nuclear war, with Obama telling the students they had a responsibility to prevent North Korea and Iran from developing atomic weapons.
Earlier on Tuesday, Obama paid a visit to Prime Minister Vladimir Putin at his country Obama and Putin, meeting for the first time, exchanged words of praise and showed a willingness to mend relations, despite on-going areas of contention including difference over expansion, Iran's nuclear ambitions and human rights concerns.
Deutsche Welle
