When I first saw the photo and read the caption, I thought perhaps either the photo or the caption was incorrect. I was wondering to myself why the Army would spend the money to upgrade the M60 when they could have the M1. Are there any Guard units out there still using M60s? Then I read further and found out it was Israeli. I then read a sidenote which said that about one thousand M60s were supplied to Israel. The lightbulb went on. Now it makes sense.
Here are some links...
http://www.army-technology.com/projects/sabra/index.html
http://www.fas.org/man/dod-101/sys/land/row/sabra.htm
http://www.globalsecurity.org/military/world/israel/sabra.htm
http://www.israeli-weapons.com/weapons/vehicles/tanks/sabra/Sabra.html