Physics Today Daily Edition
The Guardian: On 26 May, President Obama became the first sitting US president to visit Hiroshima, Japan. Obama attended a ceremony at the bombing memorial, where he gave a speech about continuing efforts for nuclear disarmament and nonproliferation. "Technological progress without an equivalent progress in human institutions can doom us," he said. "The scientific revolution that led to the splitting of an atom requires a moral revolution as well." Obama also met survivors of the attack, which killed 140 000 people.
New York Times: Earlier this month, the US Department of Defense released its annual census of the nation's nuclear arsenal through the end of the 2015 fiscal year. At that point, the US possessed 4571 warheads, down 109 from the previous year and down 702 since 2008, the last year of President George W. Bush's term in office. The disarming of 109 warheads was the lowest annual rate of disarmament during President Obama's tenure, and the total reduction since 2008 accounted for just 13.3% of the stockpile, the smallest reduction by any administration since the end of the Cold War. According to Hans M. Kristensen of the Federation of American Scientists, the slower rate of disarmament is the result of various factors. Congress has opposed much of Obama's disarmament efforts, and Russia has rejected additional cuts beyond those agreed to in the 2010 New Start treaty. There is also a potential effect from the three-decade arsenal modernization effort that Obama initiated at an estimated cost of $1 trillion.
Science: On Monday, the US House of Representatives appropriations committee presented its first draft of the 2017 budget. Accompanying the budget was a report from the committee subpanel that oversees NASA. In the report, the subpanel calls for NASA to produce a technology assessment and conceptual road map within a year for an interstellar probe capable of reaching 10% of the speed of light. The report comes in the wake of the Breakthrough Starshot project, which proposes to use concentrated laser light to send tiny probes to other stars. The report does not say where funding for the NASA project will come from.