Two pubcasters been named Nieman Fellows for 2010, and will be traveling to Harvard University for a year of study, seminars and special events. WBUR’s Massachusetts statehouse reporter Martha Bebinger will focus on the politics of reducing health-care spending. Lisa Mullins, an anchor and senior producer on Public Radio International’s The World, will assess diplomacy in U.S. foreign policy during the first 16 months of the Obama administration. Administered since 1938 by the Nieman Foundation, this is the oldest and most prestigious midcareer fellowship program for journalists.