In the face of carrier Mexicana's continued bankruptcy and inactivity, two Mexican airlines are expanding their U.S. operations. Aeromexico last week announced an aggressive expansion plan that includes an initial public offering on the Mexican stock market and a US$1.3 billion investment in 20 new aircraft. In addition, the airline is beefing up its routes, both domestically and internationally. International flights are being added to Miami, San Antonio, and Fresno and Sacramento in California. Service also will be added to Venezuela, Guatemala and Panama. Meanwhile, Mexican low-fare carrier Volaris launched service last week between Las Vegas and Guadalajara, Mexico. The airline soon will offer flights to both Fresno and Oakland, Calif., and it began flying to Chicago's Midway Airport last December.