The marijuana debate

Pot smokers formally gained the right to light up in Colorado on Dec. 10 as Governor John Hickenlooper signed into effect a controversial ballot measure legalizing marijuana for adult recreational use in what proponents hailed as a "historic day."

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  1. Mike Momany smokes marijuana, Thursday, Dec. 6, 2012, just after midnight at the Space Needle in Seattle. Possession of marijuana became legal in Washington state at midnight, and several hundred peop
  2. FILE - In this Nov. 6, 2012 file photo, people attending an Amendment 64 watch party celebrate after a local television station announced the marijuana amendment
  3. Brian Vicente co-director of the Yes on 64 campaign waits to start a news conference about the legalization of marijuana at Civic Center Park in Denver on Wednesday, Nov. 7, 2012. Colorado voters pas
  4. Betty Aldworth, center, a director of the Yes on 64 campaign responds to questions about the legalization of marijuana at a news conference at Civic Center Park in Denver on Wednesday, Nov. 7, 2012.
  5. People attending an Amendment 64 watch party in a bar hug after a local television station announced the marijuana amendment
  6. FILE - In this Nov. 6, 2012 file photo, Amanda Jetter celebrates along with others attending an Amendment 64 watch party in a bar after a local television station announced the marijuana amendment
  7. A medical marijuana plant is shown at the Northwest Patient Resource Center medical marijuana dispensary, Wednesday, Nov. 7, 2012, in Seattle. After voters weighed in on election day, Colorado and Was
  8. Jake Dimmock, co-owner of the Northwest Patient Resource Center medical marijuana dispensary, works on balancing the pH level of the soil used to grow new medical marijuana plants, Wednesday, Nov. 7,
  9. Medical marijuana is packaged for sale in 1-gram packages at the Northwest Patient Resource Center medical marijuana dispensary, Wednesday, Nov. 7, 2012, in Seattle. After voters weighed in on electio