purposes, never to be put back onto the road. Reaction In the aftermath of the program, reactions to the cancellation of the EV1 continued to be mixed. In GM's view, the EV1 was not a failure, but the program was doomed when the expected breakthroughs in battery technology did not take place within the anticipated timeline, citing the lack of availability of the NiMH-technology battery packs, developed by Energy Conversion Devices of Michigan, until late in the production cycle. The batteries improved the EV1's range, but not as dramatically as expected, and came with their own set of problems; a less-efficient charging algorithm had to be used (lengthening charge times), and the batteries heated up more quickly than the lead–acid packs (requiring use of the air conditioner to cool them down, wasting power). The automaker also cited the elimination of the CARB zero-emissions mandate as a factor in the program's cancellation, though the company was widely accused of lobbying against the mandate in an act of deliberate self-sabotage. The media perspective was far less favorable; in 2006, The Wall Street Journal Detroit Bureau Chief Joe White said, "The EV1 was a failure, as were other electric vehicles launched in the 1990s to placate California clean-air regulators." This opinion was echoed by Time magazine, who in 2008 placed the EV1 on their list of "The 50 Worst Cars of All Time". In light of falling car sales later in the decade, as the world oil and financial crises began to take hold, opinions of the EV1 program began to change. In 2006, former GM Chairman and CEO Rick Wagoner stated that his worst decision during his tenure at GM was "axing the EV1 electric-car program and not putting the right resources into hybrids. It didn't affect profitability, but it did affect image." Wagoner repeated this assertion during an NPR interview after the December 2008 Senate hearings on the U.S. auto industry bailout request. In the March 13, 2007, issue of Newsweek, "GM R&D chief Larry Burns ... now wishes GM hadn't killed the plug-in hybrid EV1 prototype his engineers had on the road a decade ago: 'If we could turn back the hands of time,' says Burns, 'we could have had the Chevy Volt 10 years earlier, referring to the plug-in hybrid car considered to be the technological and spiritual successor to the EV1. Tesla CEO Elon Musk claimed in 2017