Worried lawmakers assess border security after Mexican drug cartel attack

Two top members of Congress headed to the border Sunday to investigate a drug cartel attack on a U.S. Customs and Border Protection helicopter, which raised more concerns about escalating violence spilling north.

Rep. Jason Chaffetz, Utah Republican and chairman of the House Oversight and Government Reform Committee, and Rep. Blake Farenthold, Texas Republican, were planning to get a firsthand look at the situation in Laredo, Texas, after the helicopter was forced to make an emergency landing Friday.

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