from ovever 200 indodoor and d outdoor alallergens, day afafter day. ♪ oh thehe most wondnderful ti♪ feel thehe clarity - - and mamake today the e most wondederful time of t the year. live claritin clear. could be days until the tracks are cleared and operational following a fiery crash on cal train. finally tonight, gadi schwartz with an exclusive test drive of a vehicle that could be headed to the moon. >> lififtoff!