Every tank ever built is very easy to destroy if you can attack it from behind, below (large mine) or overhead. If those areas were as well armored as the front, they wouldn't be able to move.
Haven't quite seen the media panic and hand-wringing I expected for the first Abrams losses.
Anyway, point is, tanks are FAR more vulnerable than people think...even the best tanks in the world (Abrams and Challenger). Particularly in more built up areas. In a city fight infantry is protecting tanks more than tanks are protecting infantry.
Nice thing about tanks is that they can be destroyed and the crew survives...it's routine for a tank unit that loses 1/2 its tanks in combat but only have 10-15% of their men killed.
That is good to know.
Don't gotta tell me - I'm addicted to Battlefield 1942 :)