their cars. 2.7 million older jeeps, with fuel tanks that reportedly can lead to gasoline fires in a rear-end collision. tonight the government requesting that chrysler issue a giant recall. chrysler saying no. so what does this mean for everyone driving? abc s lisa stark has been investigating this issue for three years, and tonight she has the facts. reporter: it was fiery, deadly accidents like these that raised alarms. now in initial findings, the government says there s a safety defect in these older model jeeps. fuel tanks that are vulnerable to rupture in rear-end collision. we re nearing the end of people dying by fire in jeeps. reporter: you can see in these crash tests, simulating fuel spilling from the cherokee. chrysler claimed the tests were too severe. but today the national highway traffic safety administration called on chrysler to recall older model jeep grand cherokees and jeep liberties, saying the defect presents an unreasonable risk because people i