21.   Currently, trucks from Mexico can cross into the United States, but cannot venture beyond designated commercial areas in border cities such as Laredo and El Paso.

22.   Doris Meissner, Immigration and Naturalization Service commissioner, defended military involvement in drug-interdiction efforts while touring border cities this week in South and West Texas.

23.   During his three months in this northern border city, Mexican officials say he helped arrest three members of the Gulf drug cartel.

24.   Earlier this month, a memorial to Canadians who served in Vietnam was dedicated in this border city despite angry objections from Americans and Canadians who opposed the war.

25.   Doctors, dentists and students donate their time and often their own vehicles to travel to the border cities.

26.   Finally, he began allowing military officers to replace federal police agents in several border cities plagued by smugglers.

27.   Francisco Villareal, the opposition mayor of this border city, was fed up.

28.   In addition to patrolling in vehicles, agents walk the streets and ride bicycles through border cities and towns.

29.   In recent years, however, bullfighting has surged in popularity in Tijuana, Juarez and other border cities.

30.   In some border cities military officers have replaced federal police, whose ranks were riddled with corruption.