The crisis in Ukraine intensifies.<br/> <br />Pro-Russian rebels shot down two Ukrainian helicopters on Friday, trying to retake separatist-held Slaviansk.<br/> <br />Kiev said two helicopter crew had died and seven servicemen had been wounded in the operation.<br/> <br />Separatists said Ukrainian forces killed three of their fighters and two civilians.<br/> <br />Ukraine's acting president is again calling for an end to this violence:<br/> <br />(SOUNDBITE) (Ukrainian) OLEKSANDER TURCHINOV, ACTING PRESIDENT OF UKRAINE, SAYING:<br/> <br />"We demand the terrorists, saboteurs, all those who took up arms against our country to lay down their arms, surrender, release hostages and administrative buildings."<br/> <br />On the other side of Ukraine, violence erupted between pro-Ukrainian and pro-Russian activists in Odessa.<br/> <br />Police said 38 people were killed in a building fire here, three people were shot dead and 15 others were wounded.<br/> <br />The escalating violence is resonating across the globe. An issue German Chanc
