Owner Eric Jensen examines cantaloupe on the Jensen Farms near Holly, Colo., last month.

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itoggle caption Ed Andrieski/AP

Arlene Kalley and her daughter Leila, who support the use of Avastin for breast cancer, hold a banner outside the National Mall in Washington in June.

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itoggle caption Terry Kalley/AP

Laura Zakhar connects her son, Kevin, 15, to the "feedbag" that contains his nutrition. Lately, Zakhar has had trouble getting the calcium solution Kevin needs, in part because hospitals have been reserving limited supplies for patients who need it even more desperately than he does. Elizabeth Larkin for NPR hide caption

itoggle caption Elizabeth Larkin for NPR