Complex sentence: The cross-border tunnels were used in the capture of Gilad Shalit in 2006, and multiple times during the 2014 conflict; in practice only Israeli military targets have successfully been attacked through them.
Split into simpler sentences: The cross-border tunnels were used in the capture of Gilad Shalit in 2006, and multiple times during the 2014 conflict. In practice, only Israeli military targets have successfully been attacked through them.