When did New York annex DCA? Or can I now get to Manhattan on Metro

?
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by L Dude 7:
How many cities have multiple airports with commercial scheduled service within the city:
I can think of a few:
Chicago: ORD, MDW (and until a few years back, CGX)
New York: LGA, DCA
Berlin: TXL, THF (I think)
Washington DC has two airports, but both are in Virginia, so it wouldn't count.
Are there other cities with multiple airports? (Or even airports actually within a city proper, for that matter...)</font>