The Israeli army said on Tuesday it was intensifying its campaign in Khan Younis, the main city in southern Gaza where Israeli officials believe Hamas’ military leaders have their stronghold. The Israel Defense Forces (IDF) said that troops have “carried out an extensive operation during which they encircled Khan Younis and deepened the operation in the area.” The IDF said “dozens of terrorists” have been killed in the past 24 hours in Khan Younis and that “ground troops engaged in close-quarters combat” with militants. Israel believes senior Hamas officials are hiding in tunnels in Khan Youni…