jamie points out news that President Obama has put out a call for a world free of nuclear weapons at a speech in Prague today. He acknowledged that it was a long-term goal, perhaps not something that can be accomplished in his lifetime, but promised to encourage the US Senate to ratify the Comprehensive Test Ban treaty. According to the BBC, he also stated his desire to "negotiate a new treaty to end the production of fissile materials for nuclear weapons," and to hold a global summit within the next year to work out agreements for preventing the spread of nuclear weapons. Obama said, "As the only nuclear power to have used a nuclear weapon, the United States has a moral responsibility to act. We cannot succeed in this endeavor alone, but we can lead it." His speech came less than a day after North Korea's launch of a long-range rocket.

alevy writes to mention that scientists at Fermilab have detected a new, completely untheorized particle. Seems like Fermi has been a hotbed of activity lately with the discovery of a new single top quark and narrowing the gap twice on the Higgs Boson particle. "The Y(4140) particle is the newest member of a family of particles of similar unusual characteristics observed in the last several years by experimenters at Fermilab's Tevatron as well as at KEK and the SLAC lab, which operates at Stanford through a partnership with the U.S. Department of Energy. 'We congratulate CDF on the first evidence for a new unexpected Y state that decays to J/psi and phi,' said Japanese physicist Masanori Yamauchi, a KEK spokesperson. 'This state may be related to the Y(3940) state discovered by Belle and might be another example of an exotic hadron containing charm quarks. We will try to confirm this state in our own Belle data.'"