Complex sentence: In February 2007, "The Daily Telegraph" claimed that American forces had recovered more than 100 of the rifles from Iraqi insurgents and that within 45 days of the delivery of the rifles to Iran, an American soldier was killed by one of the weapons.
Split into simpler sentences: In February 2007, "The Daily Telegraph" reported that American sources claimed to have recovered more than 100 of the rifles from Iraqi insurgents. Within 45 days of the delivery of the rifles to Iran, an American soldier was allegedly killed by one of the weapons.