Buenos Aires, Jul 18 (Prensa Latina) The Grandmothers of Plaza de Mayo Association concerned over the visit of lawmakers of La Libertad Avanza (LLA) to detainees for crimes against humanity perpetrated during the last civil-military dictatorship in Argentina (1976-1983). Lately, social organizations, trade unions, and the media denounced that the legislators frequented Alfredo Astiz, Raul Guglielminetti, Carlos Suarez (son), Antonio Pernias, and Adolfo Donda, who were tried and imprisoned for kidnapping, torturing, murdering, and disappearing people, including children, during that regime.