mvn tomcat:run may fail, option to use mvn tomcat7:run

I run into error when trying to run spring-mvc-showcase using maven from command line.
I could not get maven artifacts. It was solved by using The Apache Tomcat Maven Plugin 2 (http://tomcat.apache.org/maven-plugin-2.0/) with mvn tomcat7:run. After that mvn tomcat:run was also OK.