The U.K. has a migrant crisis. (Video via Sauvons Calais)
Thousands of migrants have gathered in the French port city of Calais. (Video via International Business Times)
They've fled Africa and the Middle East, and now, they're trying to enter the U.K. (Video via CCTV)
Hundreds gather in groups along roads or railways, hoping to catch a U.K.-bound truck or train traveling in the tunnel under the English Channel. (Video via BBC)
Housing, work, health care or existing communities draw migrants fleeing countries as far away as Afghanistan.
But they don't always make it. One man was killed recently, crushed by a truck.
U.K. Prime Minister David Cameron has vowed to prevent more from entering.
"And that we will remove more illegal migrants from our country so people know it's not a safe haven once they get there," Cameron said on BBC.
Asylum Aid, which provides legal representation for migrants, is critical of both countries' responses. (Video via Financial Times)
"Caught between two of the richest and most powerful countries in the world, and they can't seem to agree on a humane solution for them. It's absolutely disgraceful," Asylum Aid spokeswoman Zoe Gardner said on BBC.