CTBTO executive secretary

CTBTO executive secretary

VIENNA, Austria - Comprehensive Nuclear Test Ban Treaty Organization Executive Secretary Tibor Toth speaks during an interview with Kyodo News in Vienna on Feb. 12, 2013.

Interview with CTBT exec

Interview with CTBT exec

VIENNA, Austria - Tibor Toth, executive secretary of the provisional secretariat at the preparatory commission for the Comprehensive Test Ban Treaty Organization, speaks during an interview at the commission headquarters in Vienna, Austria, on April 18, 2012. Toth looks at a screen showing the locations of about 280 seismic wave monitoring facilities around the world, which can immediately detect any nuclear test by North Korea.

Interview with CTBT exec

Interview with CTBT exec

VIENNA, Austria - Tibor Toth, executive secretary of the provisional secretariat at the preparatory commission for the Comprehensive Test Ban Treaty Organization, speaks during an interview at the commission headquarters in Vienna, Austria, on April 18, 2012. Toth points to a screen showing the locations of about 280 seismic wave monitoring facilities around the world, which can immediately detect any nuclear test by North Korea.

Interview with CTBT exec

Interview with CTBT exec

VIENNA, Austria - Tibor Toth, executive secretary of the provisional secretariat at the preparatory commission for the Comprehensive Test Ban Treaty Organization, speaks during an interview at the commission headquarters in Vienna, Austria, on April 18, 2012. Toth points to a screen showing the locations of about 280 seismic wave monitoring facilities around the world, which can immediately detect any nuclear test by North Korea. (Kyodo)

Interview with CTBT exec

Interview with CTBT exec

VIENNA, Austria - Tibor Toth, executive secretary of the provisional secretariat at the preparatory commission for the Comprehensive Test Ban Treaty Organization, speaks during an interview at the commission headquarters in Vienna, Austria, on April 18, 2012. Toth looks at a screen showing the locations of about 280 seismic wave monitoring facilities around the world, which can immediately detect any nuclear test by North Korea. (Kyodo)