Delay for 3 Hours

The title says it all. We were all om the plane ready to go when the caption said the a person would had to get off the flight due to security reasons but we would be leaving soon and could make up the time during the flight...But we did not leave. We sat there and sat there. Well the was a problem with the plane and after a bit more time it was decided that everyone was to get off the plane should it could be repaired and another plane would get ready for us.  The new take off time is 1pm local time. So I now have 3 hours to kill. I will eat since it is about lunch time for me and then I might look at the shops...not sure what else I can do. Well pray for safe travels and no more delays.