Las Vegas gunman may have planned attacks, including car bomb, on other festivals

Investigators are looking into whether gunman Stephen Paddock scoped out bigger music festivals before shooting scores of country music fans in Las Vegas.

Paddock booked rooms overlooking the Lollapalooza festival in Chicago in August and the Life Is Beautiful show near the Vegas Strip in late September, according to authorities reconstructing his movements before he undertook the deadliest mass shooting in modern US history.