Project 4.1
In 1994, a 1953 "Castle Bravo" program prospectus was found which included reference to Project 4.1 apparently written before the "Bravo" shot had occurred. The U.S. government responded that someone had gone back into the project list after the "Bravo" test to insert Project 4.1; thus, according to the U.S. government, the acts were not premeditated. All other U.S. documents point to Project 4.1 having been established after the "Bravo" test—most sources point to its having been organized on March 7, 1954. The final Project 4.1 report began in its preface with the statement that "Operation CASTLE did not include a biomedical program" (it mentions this in discussing the ad hoc nature by which the project personnel were assembled). All official and mainstream historical accounts of the "Bravo" test indicate that its high level of fallout was a result of a miscalculation in relation to its design and was not deliberate (see the Castle Bravo article for more information on the alleged accident).
Castle of Castelo Branco
In 1981, structures that belonged to the GNR, and which were addorsed to the walls along the "Rua Vaz Preto" were demolished. During the course of the demolition of houses along "Rua Vaz Preto", part of the original wall and towers were re-discovered. This led to the 5 June 2009 proposal to seek a formal classification of the site's heritage status. On 26 October 2009, the DRCCentro requested the castle's classification as a "Property of Public Interest". It was accepted on 28 October by the consultative council of IGESPAR, but the process was archived on 7 January 2013, and the site never obtained its classification.