WASHINGTON  Families of Americans killed by Israeli forces and illegal settlers gathered outside the US Capitol on Tuesday alongside lawmakers to demand the US launch independent investigations and hold Israel accountable for what they described as years of impunity. A news conference hosted by Rep. Pramila Jayapal brought together relatives of Aysenur Ezgi Eygi, Sayfollah “Saif” Musallet, Tawfic Abdel Jabbar, Rachel Corrie and Mohammed Ibrahim, a 16-year-old Palestinian American who is