The Defense Security Cooperation Agency yesterday notified Congress of Taiwan's interest in buying two ultra-high-frequency, long-range early warning radars worth nearly $1.8 billion. The potential sale has been contemplated since 2000, according to Air Force documents . The current plan, announced via a request for information in January, is called the Surveillance Radar Program; formerly, it was known as the Defensive Radar Program. In its announcement , DSCA said the Taipei Economic and Cultural Representative Office -- Taiwan's U.S. presence...