An Israeli tank is seen after entering the Gaza Strip in this still image taken from video provided by the Israeli Defence Force (IDF) on July 18, 2014. Israel intensified its land offensive in Gaza ... more 
An Israeli tank is seen after entering the Gaza Strip in this still image taken from video provided by the Israeli Defence Force (IDF) on July 18, 2014. Israel intensified its land offensive in Gaza with artillery, tanks and gunboats on Friday and warned it could "significantly widen" an operation Palestinian officials said was killing ever greater numbers of civilians. REUTERS/IDF/Handout via Reuters (GAZA - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) ATTENTION EDITORS ' THIS PICTURE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS IMAGE. NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS less 
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Reuters | Photo By HANDOUT / REUTERS
Fri, Jul 18, 2014 10:41 AM EDT