Massachusetts in February 1991, declaring, the "Patriot is 41 for 42: 42 Scuds engaged, 41 intercepted!" In April 1992, Postol told a House committee that "the Patriot's intercept rate during the Gulf War was very low. The evidence from these preliminary studies indicates that Patriot's intercept rate could be much lower than 10 percent, possibly even zero." Postol later criticized the Army's "independent" Analysis of Video Tapes to Assess Patriot Effectiveness as being "seriously compromised" by the "selective" and "arbitrary" use of data. A House Government Operations Committee investigation in 1992 concluded that, contrary to military claims on effectiveness, Patriot missiles destroyed only 9 percent of SCUD missiles during attempts at interception. National ballistic missile defense In 1996, Dr. Nira Schwartz, a senior test-engineer at defense contractor TRW blew the whistle on TRW for exaggerating the capabilities of an antiballistic missile sensor. The sensor was subsequently used in a "successful" missile test in 1997. The then-Ballistic Missile Defense Organization launched an investigation in 1998 and asked a Pentagon advisory board called POET (Phase One Engineering Team), which included two staff members from MIT's Lincoln Laboratory, to review performance of TRW software, using data from the 1997 flight test. These engineers concluded in their report that Schwartz's allegations were untrue and despite failure of the sensor, the software "basically worked the way TRW said it worked." In December 1998, TRW's contract was not extended by the government, which chose a competing system built by Raytheon. In 2000, Schwartz gave Postol an unclassified version of the POET report from which sensitive text and graphs had been removed. Based on this redacted report, he notified the White House and senior MIT officials of possible fraud and research misconduct at TRW and MIT Lincoln Laboratory. The Pentagon responded by classifying the letter and dispatching Defense Security Service members to his office. Three agents of the Defense Security Services arrived unannounced to his campus office and attempted to show him other classified documents, but Postol refused to look at them. If he had read them, he would not have been able to criticize the antimissile system without putting his security clearance at risk. Postol said the visit was meant to silence him, which the Defense Security Services denied. Investigation into TRW/MIT Lincoln Laboratory report Postol demanded the MIT administration under President Charles Vest and Provost Robert Brown investigate possible violations to MIT policies on research