millions of jews died. also a nazi collaborator who engineered the arrest and execution of jews in poland. we haven't heard the last of that story. it's an outrage story for a lot of folks. we turn to a libyan militant who pleaded not guilty from the 2012 benghazi attack that killed ambassador chris stevens. he's thought to be the master mind of that attack. he entered the plea through his watorney yesn a cease-fire is technically still in place in eastern ukraine, but the violence has not stopped a powerful explosion rocked donetsk. it was followed by a barrage of rockets. the blast also brought a news conference to a halt leaving journalists crawling on their hands and knees. more than 300 people have been killed since last month's truce. sweden ning search f distressed russian submarine i the waters near stockholm. the russians suggest it was a dutch submariwitht international intrigue, he abc's t >> reporter: somewhere underneath these waves the swedish government believes an intruder lurks. perhaps a russian submarine.