For the last six years, the U.S. government has spent more than $24 million to fly a plane around Cuba and beam American-sponsored TV programming to the island's inhabitants. But every day the plane flies, the government in Havana jams its broadcast signal. Few, if any, Cubans can see what it broadcasts. The program is run by the U.S. Broadcasting Board of Governors, and for the last two years, it has asked Congress to scrap the program, citing its exorbitant expense and dubious cost-effectiveness.