 We have been talking with Katie Pumphrey, a new hero of Baltimore swimming. Michael Phelps, you go ahead and eat your heart out. Katie, thank you. Thank you so much. The Biden administration wants to build up a battery industry here in the U.S. because batteries are a key to a green energy future. Think electric cars. One key mineral in batteries is graphite. Yes, like in pencils. NPR's Sally Helms has the story about what it takes to build an industry from scratch.