 This week on Science Friday, there are more than 300 drugs in shortage in the U.S., from basic antibiotics to life-saving cancer treatments. Shortages, they are omnipresent. They smolder along. Now, like we've had other times, it's a five-alarm fire. They never go away. We'll take a look into what's behind this massive shortage. That's coming up on Science Friday from WNYC Studios.