news: add ET_2024_05 announcement

_data/news.yml

@@ -1,3 +1,9 @@
+- date: "June 28, 2024"
+  link: "ET_2024_05/index.html"
+  title: 'Einstein Toolkit "Landau" Release'
+- date: "June 28, 2024"
+  link: "cactus_4.16.0/index.html"
+  title: 'Cactus 4.16.0 Release'
 - date: "December 14, 2023"
   link: "ET_2023_11/index.html"
   title: 'Einstein Toolkit "Meitner" Release'

media/news/ET_2024_05/index.md

@@ -0,0 +1,14 @@
+---
+layout: default
+title:  Einstein Toolkit "Landau" Release
+---
+We are pleased to announce the twenty-seventh release (code name
+[Landau](https://en.wikipedia.org/wiki/Lev_Landau)) of the
+Einstein Toolkit, an open, community developed software infrastructure for
+relativisticastrophysics.
+
+For more information about using or contributing to the Einstein Toolkit, or to
+join the Einstein Toolkit Consortium, please visit our web pages at
+[http://einsteintoolkit.org](http://einsteintoolkit.org).
+
+### June 28, 2024 Steven R. Brandt

media/news/cactus_4.16.0/index.md

@@ -0,0 +1,13 @@
+---
+layout: default
+title: Cactus 4.16.0 release
+---
+We are pleased to announce release 4.16.0 of the Cactus computational toolkit
+in conjunction with the [Landau](https://en.wikipedia.org/wiki/Lev_Landau)
+release of the
+[Einstein Toolkit](https://einsteintoolkit.org).
+
+Read more about the new release in the longer
+[Einstein Toolkit release notes](https://einsteintoolkit.org/about/releases/ET_2023_05_announcement.html).
+
+### June 28, 2024 Steven R. Brandt