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Six nations have been trying to hammer out an outline for a future agreement aimed at curbing iran's nuclear program. a final deal could end crushing economic sanctions against iran. there will be no movement in the boston marathon bombing trial of dzhokhar tsarnaev for a few days now the defense rested its case. the case was completed in two days of testimony. prosecutors and tsarnaev's attorneys now have until monday to work on their closing arguments. abc's lana zak reports. >> reporter: four witnesses and six hours. that's the entire defense mounted for dzhokhar tsarnaev in the boston ma...

Happened the night he shot and killed trayvon martin, enough detail for osterman to write a book. >> you quoted him as saying he took my hand and covered my nose. what words did he other? >> he said, you're going to die. he used the mf term, again. i'm sorry, i don't like to curse in front of ladies. >> he used the word you're going to die -- >> that is correct. >> prosecutors say there is no proof that martin reached for the gun. the state's fingerprint analyst examined it. >> did you find any prints? >> no. >> reporter: in cross-examination, kristen benson told the court rain could have had ...