diff --git a/README.md b/README.md
index 761226b6f..3b8ad1857 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ Two other approaches are commonly taken to provide stronger isolation than
native containers.
+virtualization"){style="display:block;margin:auto"}
**Machine-level virtualization**, such as [KVM][kvm] and [Xen][xen], exposes
virtualized hardware to a guest kernel via a Virtual Machine Monitor (VMM). This
@@ -48,7 +48,7 @@ performance (though nested virtualization may bring challenges in this area),
but for containers it often requires additional proxies and agents, and may
require a larger resource footprint and slower start-up times.
-
+{style="display:block;margin:auto"}
**Rule-based execution**, such as [seccomp][seccomp], [SELinux][selinux] and
[AppArmor][apparmor], allows the specification of a fine-grained security policy
@@ -63,7 +63,7 @@ making this approach challenging to apply universally.
Rule-based execution is often combined with additional layers for
defense-in-depth.
-
+{style="display:block;margin:auto"}
**gVisor** provides a third isolation mechanism, distinct from those mentioned
above.
@@ -107,7 +107,7 @@ application to directly control the system calls it makes.
### File System Access
-
+{style="display:block;margin:auto"}
In order to provide defense-in-depth and limit the host system surface, the
gVisor container runtime is normally split into two separate processes. First,
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diff --git a/g3doc/Rule-Based-Execution.png b/g3doc/Rule-Based-Execution.png
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@@ -1,223 +1 @@
-
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@@ -1,332 +1 @@
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