The opening statements are set to begin today in the trial of accused Brookline shooter John Salvi. On Tuesday, the jury was taken to see the two abortion clinics where the two women were murdered. Although the murders were not specifically discussed, the jury was asked to note the structure of the building and most took extensive notes. Salvi, who is accused of killing two receptionists at the clinics in December of 1994, chose not to accompany the jury to the Planned Parenthood and Preterm Health Services clinics. His lawyers are still pushing for an insanity defense and plan to call a half dozen mental health professionals to testify.