http://www.latimes.com/travel/deals/la-fi-0418-travel-briefcase-20110418,0,7822881.story?track=rss The U.S. Travel Assn. is running ads to pressure Congress to adopt an alternative process for business travelers and other frequent fliers. Also, business travel spending is expected to increase; and Americans pay more for air travel than Europeans. The nation's largest travel trade group launched an ad campaign last week to pressure Congress to adopt an alternative passenger screening program so that business travelers and other frequent fliers can zip through airports faster. The U.S. Travel Assn. is promoting the idea of letting frequent travelers submit to background checks so they can speed through specially designated airport lines operated by the Transportation Security Administration. That is intended to shorten the lines for everyone else who has to go through the extensive pat-down searches and full-body scans.