Ranger engineers earn Sapper tabs
 

In the U.S. Army, Sappers are combat engineers or other personnel who support the front-line infantry. A Sapper may perform a variety of combat engineering duties including bridge-building, laying or clearing minefields, demolitions, field defenses and construction and repair of buildings, roads and airfields.
http://www.patriotfiles.com/forum/iipcache/930099.png

More...