Moral of the story: when given two choices, a politician will always pick the one most likely to get them re-elected, not the one that is in their constituent's best interest:

In response to the years of protest, former President Clinton agreed to stop Navy exercises [at the Puerto Rico island of Vieques]. Congress and President Bush ratified the deal and live-fire exercises were halted last May. But with its mission muzzled after 60 years, the Navy has decided to pull out of Puerto Rico completely.

That means the largest employer on the island, the Roosevelt Roads Naval Station, is now slated for closure that could come as early as October.

...

Puerto Rican Gov. Sila Calderon, who backed the booting of the Navy from Vieques, made no apologies for a decision that could crush the Puerto Rican economy.

"We are partners with the U.S., but definitely the rights of the people of Vieques are not for sale or for any other purpose," Calderon said.

Absolutely. Never let common sense get in the way of your pissing contest.