>> reporter: the procession of hearses then winding through the streets. thousands of people stopping to honor the lives lost. others gathering in this church on this national day of mourning in the netherlands, where most of the victims were from. as the task now begins of identifying the remains, there is still no official answer as to who shot the plane down. >> who put their finger on the trigger? we still need to find that out. but suffice to say the russian separatists we believe fired this in general, could not be doing what they're doing without the russians. >> reporter: the black boxes in england to be analyzed. but more crucial evidence remains at the scene in eastern ukraine. international investigators there now despite the dangers, with two more ukrainian military planes reportedly shot down just miles away. marci gonzalez, abc news, new york. senator john walsh of montana is explaining why he used unattributed work of scholars in his masters thesis. he said he was on medication and