Brazil, as an active member of the New Agenda Coalition (NAC), could have joined the United States to strengthen the non-proliferation regime and demand progress in nuclear disarmament measures. But that didn't happen. Although President Luiz Inacio Lula da Silva welcomed the renewed commitment of the United States to nuclear disarmament and participated in some initiatives in this area led by Obama, tensions between the views of Washington and Brasilia on the supposed threats of nuclear proliferation and the way chosen to deal with them prevented further cooperation on these issues.

For more on this issue, check out the article "Brazil and the Prague Agenda: Convergence and Conflict between Brasilia and Washington's Views on Achieving Nuclear Disarmament and Curbing Nuclear Proliferation" by Renata H. Dalaqua!